id:A107250 - OEIS Search Results

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Diagonal sums of number array A107249.

+0
1

1, 1, 2, 3, 5, 9, 16, 30, 54, 104, 191, 372, 692, 1357, 2550, 5021, 9508, 18773, 35766, 70755, 135461, 268365, 515849, 1023092, 1973159, 3916831, 7575470, 15048428, 29175431, 57990158, 112665488, 224048847, 436089113, 867581269, 1691392152 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), C(floor((2n-3k-2)/2), floor((n-2k)/2))}`
	CROSSREFS	`Sequence in context: A000049 A000050 A050253 this_sequence A050168 A072176 A047061` `Adjacent sequences: A107247 A107248 A107249 this_sequence A107251 A107252 A107253`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 14 2005`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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