A110133 Numbers which are the sides that belong to only one primitive Pythagorean triangle.

3, 4, 7, 8, 9, 11, 16, 19, 23, 27, 31, 32, 43, 47, 49, 59, 64, 67, 71, 79, 81, 83, 103, 107, 121, 127, 128, 131, 139, 151, 163, 167, 179, 191, 199, 211, 223, 227, 239, 243, 251, 256, 263, 271, 283, 307, 311, 331, 343, 347, 359, 361, 367, 379, 383, 419, 431, 439

Offset

1,1

Comments

Powers of 2 starting with 2^2=4 and powers of primes of form 4k+3; none is a hypotenuse. - Ray Chandler, Jul 21 2005

Along with 2, the natural numbers that are Gaussian prime powers. Morgan L. Owens, Nov 21 2014

Links

Table of n, a(n) for n=1..58.

Crossrefs

Cf. A024357, A024363, A110134, A002145

Sequence in context: A187230 A187901 A220487 * A205647 A187903 A187839

Adjacent sequences: A110130 A110131 A110132 * A110134 A110135 A110136

Keyword

nonn

Author

Lekraj Beedassy, Jul 13 2005

Extensions

Extended by Ray Chandler, Jul 21 2005

Status

approved