A024160 Number of integer-sided triangles with sides a,b,c, a<b<c, a+b+c=n such that (c-b)(c-a)(b-a) divides (c+b)(c+a)(b+a).

0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 2, 1, 2, 2, 3, 1, 3, 3, 4, 2, 3, 3, 4, 2, 5, 3, 4, 2, 5, 5, 2, 4, 6, 6, 5, 2, 6, 5, 5, 3, 5, 5, 7, 5, 6, 5, 7, 4, 9, 7, 6, 4, 8, 7, 8, 6, 9, 6, 8, 4, 4, 8, 11, 7, 10, 4, 9, 8, 8, 7, 8, 8, 9, 9, 7, 3, 10, 8, 8, 8, 5, 9, 11, 7, 11, 8, 7, 9, 12, 12, 8, 7, 10, 9, 13, 7

Offset

1,15

Links

Table of n, a(n) for n=1..100.

Sean A. Irvine, Java program (github)

Crossrefs

Sequence in context: A249337 A316848 A139124 * A295283 A103284 A071287

Adjacent sequences: A024157 A024158 A024159 * A024161 A024162 A024163

Keyword

nonn

Author

Clark Kimberling

Extensions

a(100) corrected by Sean A. Irvine, Jun 20 2019

Status

approved