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A070204 Number of isosceles integer triangles with perimeter n having integral inradius. +0
3
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; listen)
OFFSET

1,1

COMMENT

a(n) = A070201(n) - A070203(n).

LINKS

Eric Weisstein's World of Mathematics, Incircle.

Eric Weisstein's World of Mathematics, Isosceles Triangle.

R. Zumkeller, Integer-sided triangles

CROSSREFS

Cf. A070139, A059169.

Sequence in context: A025469 A025466 A072769 this_sequence A011745 A011744 A011743

Adjacent sequences: A070201 A070202 A070203 this_sequence A070205 A070206 A070207

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.


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