id:A101552 - OEIS Search Results

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C(n-3,3)+C(n-7,7)+...+C(n-(4*floor((n-4)/4)+3),4*floor((n-4)/4)+3).

+0
2

0, 0, 0, 0, 0, 0, 1, 4, 10, 20, 35, 56, 84, 120, 166, 228, 322, 484, 785, 1352, 2396, 4248, 7405, 12592, 20856, 33728, 53524, 83912, 130956, 204968, 323665, 517356, 837206, 1368108, 2248479, 3700648, 6077900, 9938488, 16164330, 26154700, 42146078 (list; graph; listen)

	OFFSET	`0,8`
	FORMULA	`G.f.: x^6/((1-x)^4-x^8); a(n)=sum{k=0..n, if(mod(k+1, 4)=0, C(n-k, k), 0)}.`
	CROSSREFS	`Cf. A024490, A101551.` `Sequence in context: A038409 A090579 A000292 this_sequence A038419 A057319 A034223` `Adjacent sequences: A101549 A101550 A101551 this_sequence A101553 A101554 A101555`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Dec 06 2004`

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.

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