id:A090409 - OEIS Search Results

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7*8^n/9+2(-1)^n/9.

+0
2

1, 6, 50, 398, 3186, 25486, 203890, 1631118, 13048946, 104391566, 835132530, 6681060238, 53448481906, 427587855246, 3420702841970, 27365622735758, 218924981886066, 1751399855088526, 14011198840708210, 112089590725665678 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=sum{j=0..2, sum{k=0..n, C(3n+j, 3k) }}/3; a(n)=(A007613(n)+A082311(n)+A082365(n))/3.`
	CROSSREFS	`Adjacent sequences: A090406 A090407 A090408 this_sequence A090410 A090411 A090412` `Sequence in context: A138422 A001303 A027330 this_sequence A039742 A125558 A005416`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Nov 29 2003`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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