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A046116 Numbers n such that no Paley-type Hadamard matrix of order n exists. 1
92, 116, 156, 172, 184, 188, 232, 236, 260, 268, 292, 324, 356, 372, 376, 404, 412, 428, 436, 452, 472, 476, 508, 520, 532, 536, 584, 596, 604, 612, 652, 668, 712, 716, 732, 756, 764, 772, 808, 836, 852, 856, 872, 876, 892, 904, 932, 940, 944, 952, 956 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Joerg Arndt, Fxtbook

Eric Weisstein's World of Mathematics, More info (1)

Eric Weisstein's World of Mathematics, More info (2)

FORMULA

Divisible by 4 but not of form 2^a*(q+1), q = odd prime power.

CROSSREFS

Sequence in context: A039549 A101287 A065511 * A116215 A044424 A044805

Adjacent sequences:  A046113 A046114 A046115 * A046117 A046118 A046119

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com)

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Last modified February 13 06:53 EST 2012. Contains 205451 sequences.