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A319282
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Numbers of the form 16^i*(16*j + 15).
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3
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15, 31, 47, 63, 79, 95, 111, 127, 143, 159, 175, 191, 207, 223, 239, 240, 255, 271, 287, 303, 319, 335, 351, 367, 383, 399, 415, 431, 447, 463, 479, 495, 496, 511, 527, 543, 559, 575, 591, 607, 623, 639, 655, 671, 687, 703, 719, 735, 751, 752, 767, 783, 799, 815
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OFFSET
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1,1
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COMMENTS
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{-a(n)} gives all negative fourth powers modulo all powers of 2, that is, negative fourth powers over 2-adic integers.
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LINKS
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FORMULA
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a(n) = 15*n + O(log(n)).
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PROG
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(PARI) isA319282(n)= n\16^valuation(n, 16)%16==15
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CROSSREFS
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Perfect powers over 2-adic integers:
Fourth powers: positive: A319281; negative: this sequence (negated).
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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