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A004986
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(2^n/n!)*product[ k=0..n-1 ](4*k + 7).
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0
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1, 14, 154, 1540, 14630, 134596, 1211364, 10729224, 93880710, 813632820, 6997242252, 59794615608, 508254232668, 4300612737960, 36248021648520, 304483381847568, 2550048322973382, 21300403638954132, 177503363657951100
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| A(x) = (1 - 8*x)^(-7/4).
a(n) ~ 4/3*Gamma(3/4)^-1*n^(3/4)*2^(3*n)*{1 + 21/32*n^-1 - ...}
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MAPLE
| seq(2^n/n!*product(4*k + 7, k=0..n-1), n=0..30);
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CROSSREFS
| Sequence in context: A016215 A097227 A125426 * A154248 A006865 A154347
Adjacent sequences: A004983 A004984 A004985 * A004987 A004988 A004989
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KEYWORD
| nonn,easy
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AUTHOR
| Joe Keane (jgk(AT)jgk.org)
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 24 2002
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