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| A274640
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Counterclockwise square spiral constructed by greedy algorithm, so that each row, column, and diagonal contains distinct numbers.
(history;
published version)
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#147 by Michel Marcus at Sun Sep 13 02:22:19 EDT 2020
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#146 by Joerg Arndt at Sun Sep 13 01:58:40 EDT 2020
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#145 by Michel Marcus at Sat Sep 12 17:41:56 EDT 2020
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#144 by Michel Marcus at Sat Sep 12 17:41:50 EDT 2020
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| CROSSREFS
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Cf. A274821 (the same construction on a hexagonal tiling)).
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| STATUS
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proposed
editing
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#143 by Alec Jones at Sat Sep 12 17:29:16 EDT 2020
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#142 by Alec Jones at Sat Sep 12 17:29:14 EDT 2020
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| CROSSREFS
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Cf. A274821 (the same construction on a hexagonal tiling)
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| STATUS
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approved
editing
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#141 by N. J. A. Sloane at Sat Mar 07 13:50:20 EST 2020
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| LINKS
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F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, <a href="httphttps://arxivwww.combinatorics.org/absojs/1907index.09120php/eljc/article/view/v27i1p52/8039">Queens in exile: non-attacking queens on infinite chess boards</a>, arXivElectronic J. Combin., 27:19071 (2020), #P1.52.09120, July 2019
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Discussion
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| Sat Mar 07
| 13:50
| OEIS Server: https://oeis.org/edit/global/2853
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#140 by N. J. A. Sloane at Mon Jul 22 22:21:42 EDT 2019
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#139 by N. J. A. Sloane at Mon Jul 22 22:21:39 EDT 2019
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F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, <a href="http://arxiv.org/abs/1907.09120">Queens in exile: non-attacking queens on infinite chess boards</a>, arXiv:1907.09120, July 2019
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| STATUS
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approved
editing
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#138 by N. J. A. Sloane at Thu Jul 04 10:49:08 EDT 2019
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