id:A127768 - OEIS Search Results

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Row sums of the inverse of number triangle A(n,k)=if(k<=n,if(n<=2k,1/C(n),0),0), C(n)=A000108(n).

+0
3

1, 1, 1, 4, 9, 29, 90, 301, 1001, 3441, 11934, 42019, 149226, 534978, 1931540, 7020706, 25662825, 94288121, 347993910, 1289627931, 4796857230, 17902158534, 67016296620, 251577092029, 946844533674 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`a(2n)=A127769(n). Row sums of A127767.`
	CROSSREFS	`Sequence in context: A094255 A069563 A059345 this_sequence A091658 A086688 A151270` `Adjacent sequences: A127765 A127766 A127767 this_sequence A127769 A127770 A127771`
	KEYWORD	`nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 28 2007`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research