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

Author

Ray Chandler, Aug 26 2004

Keywords

• nonn

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

• Eric Weisstein's World of Mathematics, Pythagorean Triple.

Crossrefs

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

Extensions

Correct offset. Ray Chandler, Jan 15 2013