id:A100472 - OEIS Search Results

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Inverse modulo 2 modulo transform of 9^n.

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1, 8, 80, 640, 6560, 52480, 524800, 4198400, 43046720, 344373760, 3443737600, 27549900800, 282386483200, 2259091865600, 22590918656000, 180727349248000, 1853020188851840, 14824161510814720, 148241615108147200 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`9^n may be retrieved as sum{k=0..n, mod(binomial(n,k),2)A100742(k)}.`
	FORMULA	`a(n)=sum{k=0..n, (-1)^A010060(n-k)*mod(binomial(n, k), 2)9^k}.`
	CROSSREFS	`Sequence in context: A100431 A102698 A055346 this_sequence A043035 A024101 A136949` `Adjacent sequences: A100469 A100470 A100471 this_sequence A100473 A100474 A100475`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Dec 06 2004`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

AT&T Labs Research