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Search: id:A111396
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| 0, 12, 30, 55, 88, 130, 182, 245, 320, 408, 510, 627, 760, 910, 1078, 1265, 1472, 1700, 1950, 2223, 2520, 2842, 3190, 3565, 3968, 4400, 4862, 5355, 5880, 6438, 7030, 7657, 8320, 9020, 9758, 10535, 11352, 12210, 13110, 14053, 15040, 16072, 17150, 18275, 19448
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OFFSET
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0,2
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FORMULA
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a(n)=C(n,3)-2*C(n,2),n>=8 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 25 2006
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MAPLE
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[seq(binomial(n, 3)-2*binomial(n, 2), n=8..52)]; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 25 2006
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CROSSREFS
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Sequence in context: A031107 A019557 A131874 this_sequence A080385 A120090 A086830
Adjacent sequences: A111393 A111394 A111395 this_sequence A111397 A111398 A111399
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KEYWORD
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nonn
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AUTHOR
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njas, Nov 11 2005
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