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Search: id:A070209
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| 17, 116, 212, 269, 368, 370, 493, 561, 587, 659, 850, 1204, 1297, 1582, 1599, 1629, 1920, 1988, 2115, 2352, 2555, 2574, 2774, 2778, 3251, 3473, 3746, 3751, 4286, 4298, 4307, 4313, 4319, 4330, 4370, 4406, 5008, 5251
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Eric Weisstein's World of Mathematics, Incircle.
R. Zumkeller, Integer-sided triangles
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EXAMPLE
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a(3)=212: [A070080(212), A070081(212), A070082(212)] = [5,12,13], for s=A070083(212)/2=(5+12+13)/2=15: inradius = SquareRoot((s-5)*(s-12)*(s-13)/s) = SquareRoot(10*3*2/15) = SquareRoot(4) = 2; therefore A070200(212)=2. [Corrected by Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 15 2008]
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CROSSREFS
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Cf. A070142, A070201, A051516.
Sequence in context: A105127 A142403 A070144 this_sequence A070136 A032692 A044349
Adjacent sequences: A070206 A070207 A070208 this_sequence A070210 A070211 A070212
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002
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