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Search: id:A048882
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| 1, 10, 1, 120, 20, 1, 1560, 340, 30, 1, 21216, 5520, 660, 40, 1, 297024, 88032, 12880, 1080, 50, 1, 4243200, 1392768, 236448, 24640, 1600, 60, 1, 61526400, 21952320, 4187232, 512464, 41800, 2220, 70, 1, 902387200, 345396480, 72452160, 10060416
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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a(n,m)=: s2(5; n,m), generalizing s2(2; n,m) := A007318(n-1,m-1) (Pascal), s2(3; n,m) := A035324(n,m), s2(4; n,m)= A035529.
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LINKS
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W. Lang, On generalizations of Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.
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FORMULA
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a(n+1, m) = 4*(4*n+m)*a(n, m)/(n+1) + m*a(n, m-1)/(n+1), n >= m >= 1; a(n, m) := 0, n<m; a(n, 0) := 0; a(1, 1)=1.
G.f. for column m: ((-1+(1-16*x)^(-1/4))/4)^m.
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CROSSREFS
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Cf. A035529, A034255. Row sums: A048965(n), n >= 1.
Sequence in context: A075505 A130310 A051523 this_sequence A049223 A131367 A048176
Adjacent sequences: A048879 A048880 A048881 this_sequence A048883 A048884 A048885
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
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