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A065953
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Denominator of (-1)^n*n!*(E(n,2)-E(n,1)*E(n-1,1)) where E(n,x) = Sum_{k=0..n} (-1)^k*x^k/k!.
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1
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1, 1, 1, 1, 2, 6, 8, 40, 720, 560, 4480, 362880, 1209600, 13305600, 479001600, 188697600, 2641766400, 1307674368000, 774918144000, 1197600768000, 44771844096000, 3119105138688000, 73724303278080000, 4644631106519040000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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EXAMPLE
| 1, 2, 3, 5, 17/2, 89/6, 211/8, 1903/40, 62473/720, ...
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CROSSREFS
| Cf. A065952-A065956.
Sequence in context: A152158 A095239 A192009 * A118211 A050552 A105607
Adjacent sequences: A065950 A065951 A065952 * A065954 A065955 A065956
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KEYWORD
| nonn,frac
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 08 2001
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