id:A090411 - OEIS Search Results

Search: id:A090411

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G.f.: (1-x)/(1-16x).

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1, 15, 240, 3840, 61440, 983040, 15728640, 251658240, 4026531840, 64424509440, 1030792151040, 16492674416640, 263882790666240, 4222124650659840, 67553994410557440, 1080863910568919040, 17293822569102704640 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) = 15*16^(n-1)+0^n/16.` `a(n)=sum{j=0..3, sum{k=0..n, C(4n+j, 4k) }}; a(n)=(A070775(n)+A090407(n)+A001025(n)+A090408(n))/4.`
	CROSSREFS	`Cf. A090409.` `Sequence in context: A093745 A071811 A097262 this_sequence A133199 A059760 A059615` `Adjacent sequences: A090408 A090409 A090410 this_sequence A090412 A090413 A090414`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Nov 30 2003`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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