A070099 Number of integer triangles with perimeter n and relatively prime side lengths which are acute and isosceles.

0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 2, 1, 3, 1, 1, 2, 4, 1, 4, 2, 2, 2, 5, 1, 4, 2, 4, 3, 6, 2, 6, 3, 4, 3, 5, 3, 8, 3, 4, 3, 8, 3, 9, 5, 5, 4, 10, 3, 9, 4, 6, 5, 11, 4, 8, 5, 7, 6, 12, 3, 13, 6, 8, 7, 9, 4, 14, 7, 8, 5, 15, 5, 15, 7, 9, 8, 13, 6, 16, 6, 11, 8, 17, 5, 13

Offset

1,11

Links

Table of n, a(n) for n=1..85.

R. Zumkeller, Integer-sided triangles

Crossrefs

Cf. A070080, A070081, A070082, A070093, A059169, A051493, A070091, A070094, A070098, A070084, A070125.

Sequence in context: A107041 A336812 A281426 * A366381 A126760 A365467

Adjacent sequences: A070096 A070097 A070098 * A070100 A070101 A070102

Keyword

nonn

Author

Reinhard Zumkeller, May 05 2002

Status

approved