id:A083228 - OEIS Search Results

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A Jacobsthal related sequence.

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1, 3, 21, 341, 10923, 699051, 89478485, 22906492245, 11728124029611, 12009599006321323, 24595658764946068821, 100743818301219097892181, 825293359523586849932749483, 13521606402434446949298167524011 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=A001045(binom(n+2, 2))=2^binom(n+2, 2)/3-(-1)^binom(n+2, 2)/3`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A118410 A125054 A113085 this_sequence A101389 A108716 A084620` `Adjacent sequences: A083225 A083226 A083227 this_sequence A083229 A083230 A083231`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 23 2003`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

AT&T Labs Research