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Search: id:A086915
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| A086915 |
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Triangle read by rows: T(n,k) = n!/k!*binomial(n-1,k-1)*2^k. |
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+0
1
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| 2, 4, 4, 12, 24, 8, 48, 144, 96, 16, 240, 960, 960, 320, 32, 1440, 7200, 9600, 4800, 960, 64, 10080, 60480, 100800, 67200, 20160, 2688, 128, 80640, 564480, 1128960, 940800, 376320, 75264, 7168, 256, 725760, 5806080, 13547520, 13547520, 6773760, 1806336
(list; table; graph; listen)
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OFFSET
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1,1
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FORMULA
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E.g.f.: exp(2*x*y/(1-x)).
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EXAMPLE
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2; 4,4; 12,24,8; 48,144,96,16; ...
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CROSSREFS
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Cf. A052897 (row sums), A059110, A079621.
Sequence in context: A130618 A129882 A129017 this_sequence A059927 A089419 A077815
Adjacent sequences: A086912 A086913 A086914 this_sequence A086916 A086917 A086918
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KEYWORD
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nonn,tabl
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AUTHOR
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Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 24 2003
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