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A049426
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Row sums of triangle A049410.
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3
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1, 1, 4, 16, 76, 436, 2776, 19384, 148576, 1226656, 10824256, 101695936, 1010783104, 10577428096, 116166090496, 1334409569536, 15985101216256, 199216504113664, 2577292524107776, 34542575915216896, 478781761481291776
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| W. Lang, On generalizations of Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.
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FORMULA
| E.g.f. exp((-1+(1+x)^4)/4).
a(n)=n!*sum(k=1..n, sum(j=0..k, binomial(4*j,n)*(-1)^(k-j)/(4^k*(k-j)!*j!)))
[From Vladimir Kruchinin (kru(AT)ie.tusur.ru), Feb 7 2011]
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CROSSREFS
| Sequence in context: A094559 A199214 A200725 * A057725 A196192 A159926
Adjacent sequences: A049423 A049424 A049425 * A049427 A049428 A049429
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KEYWORD
| easy,nonn
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
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