A070107 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A070107

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

4

0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 2, 1, 0, 1, 1, 0, 1, 1, 2, 1, 2, 1, 2, 0, 1, 1, 2, 1, 1, 1, 2, 1, 2, 0, 2, 1, 1, 1, 3, 1, 2, 1, 2, 1, 3, 2, 3, 1, 2, 1, 3, 1, 3, 2, 1, 1, 1, 0, 4, 2, 2, 2, 4, 1, 3, 2, 3, 2, 4, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,31

LINKS

Table of n, a(n) for n=1..90.

R. Zumkeller, Integer-sided triangles

CROSSREFS

Cf. A070080, A070081, A070082, A070101, A059169, A051493, A070091, A070102, A070106, A070084, A070134.

Sequence in context: A358351 A093578 A172398 * A299908 A044933 A295343

Adjacent sequences: A070104 A070105 A070106 * A070108 A070109 A070110

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 05 2002

STATUS

approved