id:A068878 - OEIS Search Results

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sin(x)+exp(x)-1-2x=sum(n>=1,x^(2n)/a(n)).

+0
1

2, 24, 60, 720, 40320, 181440, 3628800, 479001600, 3113510400, 87178291200, 20922789888000, 177843714048000, 6402373705728000, 2432902008176640000, 25545471085854720000, 1124000727777607680000, 620448401733239439360000 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(3k+1)=(4k+2)! a(3k+2)=(4k+4)! a(3k+3)=(4k+5)!/2`
	CROSSREFS	`Sequence in context: A075265 A053657 A079608 this_sequence A100918 A152965 A139284` `Adjacent sequences: A068875 A068876 A068877 this_sequence A068879 A068880 A068881`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 29 2002`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research