id:A103632 - OEIS Search Results

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Expansion of (1-x+x^2)/(1-x-x^4).

+0
3

1, 0, 1, 1, 2, 2, 3, 4, 6, 8, 11, 15, 21, 29, 40, 55, 76, 105, 145, 200, 276, 381, 526, 726, 1002, 1383, 1909, 2635, 3637, 5020, 6929, 9564, 13201, 18221, 25150, 34714, 47915, 66136, 91286, 126000, 173915, 240051, 331337, 457337, 631252, 871303, 1202640 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Diagonal sums of A103631.`
	FORMULA	`a(n)=a(n-1)+a(n-4); a(n)=sum{k=0..floor(n/2), binomial(floor(2n-3k-1)/2, n-2k)}.`
	CROSSREFS	`Sequence in context: A141847 A089333 A098492 this_sequence A067859 A006207 A017912` `Adjacent sequences: A103629 A103630 A103631 this_sequence A103633 A103634 A103635`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 11 2005`

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Last modified March 19 01:26 EDT 2010. Contains 173632 sequences.

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