id:A008725 - OEIS Search Results

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Molien series for 3-dimensional group [2,n] = *22n.

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1

1, 2, 3, 4, 5, 6, 7, 9, 11, 13, 15, 17, 19, 21, 24, 27, 30, 33, 36, 39, 42, 46, 50, 54, 58, 62, 66, 70, 75, 80, 85, 90, 95, 100, 105, 111, 117, 123, 129, 135, 141, 147, 154, 161, 168, 175, 182, 189, 196, 204 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 190` `Index entries for Molien series`
	FORMULA	`a(n) = sum(floor(j/7), {j,0,n+7}), a(n-7) = (1/2)floor(n/7)(2n-5-7floor(n/7)) [From Mitch Harris (maharri(AT)gmail.com), Sep 08 2008]`
	MAPLE	`1/(1-x)^2/(1-x^7)`
	CROSSREFS	`Sequence in context: A057202 A033059 A031876 this_sequence A011867 A026445 A030151` `Adjacent sequences: A008722 A008723 A008724 this_sequence A008726 A008727 A008728`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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

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