1,1

Sequence comprises all odd values greater than 1. In particular, primitive Pythagorean triangles with consecutive longer sides have long and short legs 2n(n+1) {A046092(n)}and 2n+1 {A005408(n)}respectively.

Table of n, a(n) for n=1..68.

Ron Knott, Pythagorean Triples and Online Calculators

Cf. A020884.

Sequence in context: A189397 A172100 A064679 * A165747 A053229 A157142

Adjacent sequences: A081871 A081872 A081873 * A081875 A081876 A081877

nonn

Lekraj Beedassy, Apr 23 2003

Corrected and extended by Ray Chandler, Oct 29 2003

approved