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Search: id:A157984
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| A157984 |
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Sequence: a(n)=48*3!*n!/(8!*19!) |
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+0
1
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| 3, 66, 1518, 36432, 910800, 23680800, 639381600, 17902684800, 519177859200, 15575335776000, 482835409056000, 15450733089792000, 509874191963136000, 17335722526746624000, 606750288436131840000, 21843010383700746240000
(list; graph; listen)
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OFFSET
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21,1
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COMMENT
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From calculations for a Witt design:
http://www.math.uic.edu/~ronan/Witt_design;
a(n)*8!/3! - 48*n!/19!
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FORMULA
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a(n)=3!*n!/(8!*19!)
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MATHEMATICA
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Flatten[Table[If[IntegerQ[48*3!*n!/(8!*19! )], 48*3!*n!/( 8!*19! ), {}], {n, 0, 48}]]
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CROSSREFS
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Sequence in context: A028567 A003359 A157543 this_sequence A157554 A165655 A157576
Adjacent sequences: A157981 A157982 A157983 this_sequence A157985 A157986 A157987
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KEYWORD
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nonn,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Mar 10 2009
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