A087439 Expansion of (1-4x)/((1-x)(1-3x)(1-5x)).

1, 5, 22, 98, 451, 2135, 10312, 50468, 249061, 1235465, 6147802, 30650438, 152986471, 764135195, 3818284492, 19084248008, 95399716681, 476934013325, 2384476356382, 11921800651178, 59607259863691, 298031069141855

Offset: 0

Author

Paul Barry, Sep 03 2003

Keywords

• easy
• nonn

Comments

Partial sums of A081186. The sequence 0,1,5,22,.. is given by 5^n/8+3^n/4-3/8. Binomial transform of A087440.

Links

• Index entries for linear recurrences with constant coefficients, signature (9,-23,15).

Formula

a(n)=5*5^n/8+3*3^n/4-3/8.