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A096965
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Number of sets of even number of even lists, cf. A000262.
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0
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1, 1, 7, 37, 241, 2101, 18271, 201097, 2270017, 29668681, 410815351, 6238931821, 101560835377, 1765092183037, 32838929702671, 644215775792401, 13441862819232001, 293976795292186897, 6788407001443004647
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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FORMULA
| E.g.f.: exp(x/(1-x^2))*cosh(x^2/(1-x^2)).
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MATHEMATICA
| Drop[ Range[0, 20]! CoefficientList[ Series[ Exp[(x/(1 - x^2))]Cosh[x^2/(1 - x^2)], {x, 0, 20}], x], 1] (from Robert G. Wilson v Aug 19 2004)
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CROSSREFS
| Cf. A088026, A088009.
Sequence in context: A025012 A039938 A102760 * A159597 A100309 A198410
Adjacent sequences: A096962 A096963 A096964 * A096966 A096967 A096968
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KEYWORD
| easy,nonn
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AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Aug 18 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 19 2004
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