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Search: id:A079641
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| A079641 |
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Matrix product of Stirling2-triangle A008277(n,k) and unsigned Stirling1-triangle |A008275(n,k)|. |
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+0
5
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| 1, 2, 1, 6, 6, 1, 26, 36, 12, 1, 150, 250, 120, 20, 1, 1082, 2040, 1230, 300, 30, 1, 9366, 19334, 13650, 4270, 630, 42, 1, 94586, 209580, 166376, 62160, 11900, 1176, 56, 1, 1091670, 2562354, 2229444, 952728, 220500, 28476, 2016, 72, 1, 14174522
(list; table; graph; listen)
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OFFSET
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1,2
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FORMULA
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T(n, k) = Sum_{i=k..n} A008277(n, i) * |A008275(i, k)|.
E.g.f.: (2-exp(x))^(-y). - Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 22 2003
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EXAMPLE
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1; 2,1; 6,6,1; 26,36,12,1; 150,250,120,20,1; 1082,2040,1230,300,30,1; ...
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CROSSREFS
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Cf. A000670 (row sums), A000629 (first column).
Sequence in context: A008297 A048999 A090582 this_sequence A075181 A052121 A117965
Adjacent sequences: A079638 A079639 A079640 this_sequence A079642 A079643 A079644
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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.rs), Jan 30 2003
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