A025771 Expansion of 1/((1-x)(1-x^3)(1-x^11)).

1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 29, 30, 31, 33, 34, 35, 37, 38, 40, 42, 43, 45, 47, 48, 50, 52, 53, 55, 57, 59, 61, 63, 65, 67

Offset

0,4

Links

Table of n, a(n) for n=0..59.

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

Formula

a(n)= +a(n-1) +a(n-3) -a(n-4) +a(n-11) -a(n-12) -a(n-14) +a(n-15). - R. J. Mathar, Aug 21 2014

Maple

A025771 := proc(n)
        round(n^2/66 +5*n/22 +68/99 + A099837(n+3)/9) ;
end proc: # R. J. Mathar, Aug 11 2012

Prog

(PARI) Vec(1/((1-x)*(1-x^3)*(1-x^11))+O(x^99)) \\ Charles R Greathouse IV, Sep 27 2012

Crossrefs

Sequence in context: A008671 A199017 A189709 * A154403 A053265 A035452

Adjacent sequences: A025768 A025769 A025770 * A025772 A025773 A025774

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved