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A008734 Molien series for 3-dimensional group [2+,n ] = 2*(n/2). 0
1, 0, 2, 0, 3, 1, 4, 2, 6, 3, 8, 4, 10, 6, 12, 8, 15, 10, 18, 12, 21, 15, 24, 18, 28, 21, 32, 24, 36, 28, 40, 32, 45, 36, 50, 40, 55, 45, 60, 50, 66, 55, 72, 60, 78, 66, 84, 72, 91, 78, 98, 84, 105, 91, 112, 98, 120 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..56.

Index entries for Molien series

Index entries for linear recurrences with constant coefficients, signature (1,1,-1,0,0,0,0,1,-1,-1,1).

FORMULA

G.f.: ( -1-x^2-x^4+x+x^3 ) / ( (1+x^2)*(1+x^4)*(1+x)^2*(x-1)^3 ). - R. J. Mathar, Dec 18 2014

MAPLE

(1+x^5)/((1-x^2)^2*(-x^8+1)).

CROSSREFS

Sequence in context: A267182 A008720 A263352 * A226649 A053445 A175990

Adjacent sequences:  A008731 A008732 A008733 * A008735 A008736 A008737

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified December 5 13:38 EST 2016. Contains 278768 sequences.