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Search: id:A120573
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| A120573 |
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n^5+3n^3+2n = n(n^2+1)(n^2+2). |
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+0
2
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| 6, 60, 330, 1224, 3510, 8436, 17850, 34320, 61254, 103020, 165066, 254040, 377910, 546084, 769530, 1060896, 1434630, 1907100, 2496714, 3224040, 4111926, 5185620, 6472890, 8004144, 9812550, 11934156, 14408010, 17276280, 20584374, 24381060
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Largest area of any triangle with integer sides a<=b<=c and inradius n. Triangle has sides (n^2+2,n^4+2n^2+1,n^4+3n^2+1).
a(n)=A002522(n)*A054602(n) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 20 2008
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LINKS
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David W. Wilson, Table of n, a(n) for n = 1..10000
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MAPLE
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with(combinat):seq(lcm(fibonacci(4, n), fibonacci(3, n)), n=1..30); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 20 2008
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CROSSREFS
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See A120062 for sequences related to integer-sided triangles with integer inradius n.
Cf. A002522, A054602.
Adjacent sequences: A120570 A120571 A120572 this_sequence A120574 A120575 A120576
Sequence in context: A069072 A074441 A006741 this_sequence A028244 A000911 A076100
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KEYWORD
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nonn
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AUTHOR
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David W. Wilson (davidwwilson(AT)comcast.net), Jun 17 2006
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