id:A009235 - OEIS Search Results

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Expansion of exp(sinh(x)/exp(x)).

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1, 1, -1, -1, 9, -23, -25, 583, -3087, 4401, 79087, -902097, 4783801, 2361049, -348382697, 4102879415, -24288551071, -47413121055, 3214104039007, -44472852461857, 326386562502889, 417716032223049, -55104307651136313, 962111031220099495 (list; graph; listen)

	OFFSET	`0,5`
	FORMULA	`a(n) = Sum_{k=0..n} (-2)^(n-k)*stirling2(n, k). - Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 04 2003`
	MATHEMATICA	`Exp[ Sinh[ x ]/Exp[ x ] ]`
	CROSSREFS	`Cf. A004211.` `Sequence in context: A156342 A133769 A165484 this_sequence A031023 A054302 A147395` `Adjacent sequences: A009232 A009233 A009234 this_sequence A009236 A009237 A009238`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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