id:A130713 - OEIS Search Results

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a(0)=a(2)=1, a(1)=2, a(n)=0 for n>2.

+0
1

1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Self-convolution of A019590. Up to a sign the convolutional inverse of the natural numbers sequence. - Tanya Khovanova (tanyakh(AT)yahoo.com), Jul 14 2007`
	FORMULA	`G.f.: 1+2x+x^2.` `a(n)=[C((n+2)^2,n+4) mod 2]+2[C((n+1)^2,n+3) mod 2]+[C(n^2,n+2) mod 2] - Paolo P. Lava (ppl(AT)spl.at), Dec 19 2007`
	CROSSREFS	`Sequence in context: A061264 A097470 A033322 this_sequence A085857 A056620 A037860` `Adjacent sequences: A130710 A130711 A130712 this_sequence A130714 A130715 A130716`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr) and Tanya Khovanova (tanyakh(AT)yahoo.com), Jul 01 2007`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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