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A070210 Inradii of integer triangles [A070080(A070209(n)), A070081(A070209(n)), A070082(A070209(n))]. +0
3
1, 2, 2, 3, 2, 3, 3, 2, 4, 3, 4, 4, 3, 2, 4, 5, 3, 6, 4, 6, 6, 6, 4, 6, 3, 4, 3, 6, 4, 5, 4, 3, 6, 5, 7, 8, 6, 4, 6, 8, 7, 8, 9, 3, 9, 5, 6, 9, 8, 10, 6, 6, 6, 9, 8, 4, 8, 9, 7, 10, 6, 10, 12, 6, 12, 12, 5, 3, 7, 8, 10, 4, 9, 10, 11, 6, 12, 3, 6, 9, 12, 12, 7, 8 (list; graph; listen)
OFFSET

1,2

COMMENT

a(n) = A070200(A070209(n)).

LINKS

Eric Weisstein's World of Mathematics, Incircle.

R. Zumkeller, Integer-sided triangles

EXAMPLE

A070209(3)=212: [A070080(212), A070081(212), A070082(212)] = [5,12,13], let s=A070083(212)/2=(5+12+13)/2=15 then inradius = SquareRoot((s-5)*(s-5)*(s-6)/s) = SquareRoot(10*3*2/15) = SquareRoot(4) = 2; a(3)=A070200(212)=2.

CROSSREFS

Cf. A070149, A070201.

Sequence in context: A109301 A107573 A081308 this_sequence A100198 A164996 A136510

Adjacent sequences: A070207 A070208 A070209 this_sequence A070211 A070212 A070213

KEYWORD

nonn

AUTHOR

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

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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