A107250 - OEIS

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A107250

Diagonal sums of number array A107249.

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; refs; listen; history; internal format)

	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: A000050 A050253 A198518 * A050168 A072176 A047061` `Adjacent sequences: A107247 A107248 A107249 * A107251 A107252 A107253`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 14 2005`

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Last modified February 15 09:35 EST 2012. Contains 205753 sequences.