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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: A099200 A093578 A172398 * A299908 A044933 A295343

Adjacent sequences:  A070104 A070105 A070106 * A070108 A070109 A070110

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 05 2002

STATUS

approved

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Last modified August 13 02:09 EDT 2020. Contains 336441 sequences. (Running on oeis4.)