id:A023361 - OEIS Search Results

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Number of compositions into sums of triangular numbers.

+0
3

1, 1, 1, 2, 3, 4, 7, 11, 16, 25, 40, 61, 94, 147, 227, 351, 546, 846, 1309, 2030, 3147, 4876, 7558, 11715, 18154, 28136, 43609, 67586, 104748, 162346, 251610, 389958, 604381, 936699, 1451743, 2249991, 3487153, 5404570, 8376292, 12982016, 20120202 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`T. D. Noe, Table of n, a(n) for n=0..500`
	FORMULA	`G.f. : 1/(1-x-x^3-x^6-x^10-...) where powers are k(k+1)/2.`
	CROSSREFS	`Sequence in context: A060731 A125621 A120415 this_sequence A113435 A025048 A017987` `Adjacent sequences: A023358 A023359 A023360 this_sequence A023362 A023363 A023364`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified August 7 15:46 EDT 2008. Contains 142650 sequences.

AT&T Labs Research