id:A087539 - OEIS Search Results

Search: id:A087539

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First differences of A011849.

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	OFFSET	`1,4`
	FORMULA	`[ C(n+1, 3)/3 ] - [ C(n, 3)/3 ].` `G.f.: [x^3(1-x+x^2)(1-x^2+x^3)]/[(1-x)^3(1+x^3+x^6)].`
	CROSSREFS	`Sequence in context: A010062 A119565 A119592 this_sequence A140690 A004684 A036607` `Adjacent sequences: A087536 A087537 A087538 this_sequence A087540 A087541 A087542`
	KEYWORD	`nonn,easy`
	AUTHOR	`Ralf Stephan (ralf(AT)ark.in-berlin.de), Oct 24 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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