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A008740 Molien series for 3-dimensional group [2+,n] = 2*(n/2). 2
1, 2, 3, 4, 5, 7, 9, 11, 13, 16, 19, 22, 25, 28, 32, 36, 40, 44, 49, 54, 59, 64, 69, 75, 81, 87, 93, 100, 107, 114, 121, 128, 136, 144, 152, 160, 169, 178, 187, 196, 205, 215, 225, 235, 245, 256, 267, 278 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Index entries for Molien series

FORMULA

G.f. (1+x^5)/ ( (1-x)^2* (1-x^9)).

Nearest integer to (n+4)^2/9.

a(n)=a(n-4)+n - Paul Barry (pbarry(AT)wit.ie), Jul 14 2004

a(n)= +2*a(n-1) -a(n-2) +a(n-9) -2*a(n-10) +a(n-11).

MATHEMATICA

CoefficientList[Series[(1+x^5)/((1-x)^2(1-x^9)), {x, 0, 50}], x] (* From Harvey P. Dale, Aug 27 2011 *)

CROSSREFS

Sequence in context: A050376 A050198 A158923 * A089651 A063487 A081998

Adjacent sequences:  A008737 A008738 A008739 * A008741 A008742 A008743

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 08:58 EST 2012. Contains 205614 sequences.