id:A036220 - OEIS Search Results

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Expansion of 1/(1-3*x)^7; 7-fold convolution of A000244 (powers of 3).

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1, 21, 252, 2268, 17010, 112266, 673596, 3752892, 19702683, 98513415, 472864392, 2192371272, 9865670724, 43257171636, 185387878440, 778629089448, 3211844993973, 13036312034361, 52145248137444, 205836505805700 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n)=A027465(n+7,7) (O. Gerard's triangle).`
	FORMULA	`a(n) = 3^nbinomial(n+6, 6); G.f. 1/(1-3x)^7.`
	CROSSREFS	`A000244, A027465.` `Adjacent sequences: A036217 A036218 A036219 this_sequence A036221 A036222 A036223` `Sequence in context: A069601 A089937 A023019 this_sequence A022649 A125433 A135122`
	KEYWORD	`easy,nonn`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)`

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Last modified May 22 15:55 EDT 2008. Contains 140006 sequences.

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