id:A060945 - OEIS Search Results

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Number of ordered partitions of n into 1's, 2's, and 4's.

+0
7

1, 2, 3, 6, 10, 18, 31, 55, 96, 169, 296, 520, 912, 1601, 2809, 4930, 8651, 15182, 26642, 46754, 82047, 143983, 252672, 443409, 778128, 1365520 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = a(n-1)+a(n-2)+a(n-4). G.f.: (x+x^2+x^4)/(1-x-x^2-x^4)`
	CROSSREFS	`Cf. A000045 (1's and 2's only), A023359 (all powers of 2)` `Apart from n=0 term, same as unsigned version of A077930.` `Sequence in context: A066067 A121364 A102702 this_sequence A077930 A023359 A082482` `Adjacent sequences: A060942 A060943 A060944 this_sequence A060946 A060947 A060948`
	KEYWORD	`nonn`
	AUTHOR	`Len Smiley (smiley(AT)math.uaa.alaska.edu), May 07 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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