BBC Russian

Revision History for A364231

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A364231

a(n) is the number of n X n nonsingular symmetric Toeplitz matrices using all the integers 1, 2, ..., n.
(history; published version)

#12 by N. J. A. Sloane at Sat Dec 30 23:04:38 EST 2023

STATUS

proposed

approved

#11 by Andrew Howroyd at Sat Dec 30 21:56:23 EST 2023

STATUS

editing

proposed

#10 by Andrew Howroyd at Sat Dec 30 21:54:38 EST 2023

DATA

1, 2, 6, 24, 120, 718, 5005, 40274, 362604, 3627915, 39909566, 478991256

EXTENSIONS

a(10)-a(12) from Andrew Howroyd, Dec 30 2023

STATUS

approved

editing

#9 by N. J. A. Sloane at Wed Aug 02 14:42:43 EDT 2023

STATUS

proposed

approved

#8 by Stefano Spezia at Wed Jul 19 01:29:41 EDT 2023

STATUS

editing

proposed

#7 by Stefano Spezia at Wed Jul 19 01:25:41 EDT 2023

CROSSREFS

Oblique side Right diagonal of A364230.

STATUS

proposed

editing

#6 by Stefano Spezia at Tue Jul 18 17:28:04 EDT 2023

STATUS

editing

proposed

#5 by Stefano Spezia at Mon Jul 17 01:35:03 EDT 2023

DATA

1, 2, 6, 24, 120, 718, 5005, 40274, 362604

#4 by Stefano Spezia at Fri Jul 14 06:13:21 EDT 2023

NAME

a(n) is the number of n X n nonsingular symmetric Toeplitz matrices using all the integers 1, 2, …, ..., n.

#3 by Stefano Spezia at Fri Jul 14 06:01:55 EDT 2023

CROSSREFS

Oblique side of A364230.

Oblique side of A364230.Cf. A350953 (minimal determinant), A350954 (maximal determinant), A351019 (minimal permanent), A351020 (maximal permanent), A356865 (minimal nonzero absolute value determinant).