A196666 Expansion of g.f. (1 - 7*x)/(1 - 22*x).
1, 15, 330, 7260, 159720, 3513840, 77304480, 1700698560, 37415368320, 823138103040, 18109038266880, 398398841871360, 8764774521169920, 192825039465738240, 4242150868246241280, 93327319101417308160, 2053201020231180779520, 45170422445085977149440
Offset: 0
Links
- Index entries for linear recurrences with constant coefficients, signature (22).
Programs
-
PARI
a(n)=if(n,15*22^n--,1) \\ Charles R Greathouse IV, Oct 06 2011
Formula
a(0) = 1, a(n) = 15*22^(n-1) for n>0.
a(n) = Sum_{k=0..n} A193722(n,k)*7^k.
From Elmo R. Oliveira, Mar 25 2025: (Start)
E.g.f.: (15*exp(22*x) + 7)/22.
a(n) = 22*a(n-1) for n > 1. (End)