A131725 Partial sums of A131711.

0, 1, 3, 8, 10, 19, 19, 28, 36, 41, 49, 50, 50, 51, 53, 58, 60, 69, 69, 78, 86, 91, 99, 100, 100, 101, 103, 108, 110, 119, 119, 128, 136, 141, 149, 150, 150, 151, 153, 158, 160, 169, 169, 178, 186, 191, 199, 200

Offset: 0

Author

Paul Curtz, Sep 16 2007

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A131711.

Formula

O.g.f.: x*(x^8+8x^7+4x^6+5x^4+4x^2+2x+1)/((x-1)^2*(1+x)*(x^2+x+1)*(x^2-x+1)*(x^4-x^2+1)). - R. J. Mathar, Jul 04 2008

a(n) = a(n-1) + a(n-2) - a(n-3) - a(n-4) + a(n-5) + a(n-6) - a(n-7) - a(n-8) + a(n-9) + a(n-10) - a(n-11) for n > 10. - Chai Wah Wu, Jan 09 2021

Extensions

Edited by R. J. Mathar, Jul 04 2008