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A036410 G.f.: (1+x^6)/((1-x)*(1-x^3)*(1-x^4)). 1
1, 1, 1, 2, 3, 3, 5, 6, 7, 9, 11, 12, 15, 17, 19, 22, 25, 27, 31, 34, 37, 41, 45, 48, 53, 57, 61, 66, 71, 75, 81, 86, 91, 97, 103, 108, 115, 121, 127, 134, 141, 147, 155, 162, 169, 177, 185, 192, 201, 209, 217, 226, 235, 243, 253, 262, 271, 281 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..57.

G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.

Index entries for Molien series

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

FORMULA

Ceiling((n+1)^2/12).

a(n)= +a(n-1) +a(n-2) -a(n-4) -a(n-5) +a(n-6). G.f. ( -1-x^4+x^2 ) / ( (1+x)*(1+x+x^2)*(x-1)^3 ). - R. J. Mathar, Jan 22 2011

PROG

(Maxima)  makelist(coeff(taylor((1+x^6)/((1-x)*(1-x^3)*(1-x^4)), x, 0, n), x, n), n, 0, 57);  [Bruno Berselli, May 30 2011]

CROSSREFS

Cf. A008724, A001399.

Sequence in context: A220838 A236294 A251419 * A008670 A218950 A193748

Adjacent sequences:  A036407 A036408 A036409 * A036411 A036412 A036413

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 26 20:41 EDT 2017. Contains 284137 sequences.