A097755 Least integer "mod 4 prime signature" values that are the hypotenuse of no Pythagorean triples.

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 21, 24, 27, 32, 36, 42, 48, 54, 63, 64, 72, 81, 84, 96, 108, 126, 128, 144, 162, 168, 189, 192, 216, 231, 243, 252, 256, 288, 324, 336, 378, 384, 432, 441, 462, 486, 504, 512, 567, 576, 648, 672, 693, 729, 756, 768, 864, 882, 924

Offset

1,2

Comments

See A097751 for definition of "mod 4 prime signature".

Row 0 of table described in A097753; terms of A097752 with no prime factor of form 4k+1.

Links

Table of n, a(n) for n=1..59.

Eric Weisstein's World of Mathematics, Pythagorean Triple.

Crossrefs

Cf. A097751, A097752, A097753, A097754, A097756.

Sequence in context: A053640 A344470 A296991 * A301704 A083854 A275199

Adjacent sequences: A097752 A097753 A097754 * A097756 A097757 A097758

Keyword

nonn

Author

Ray Chandler, Aug 26 2004

Extensions

Correct offset. Ray Chandler, Jan 15 2013

Status

approved