OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (14,-49).
FORMULA
G.f.: -7*(3*x-1)*x/(7*x-1)^2.
a(n) = 7^(n-1)*(4*n+3) for n>0, a(0) = 0.
MAPLE
a:= n-> `if`(n=0, 0, 7^(n-1)*(4*n+3)):
seq(a(n), n=0..30);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Sep 18 2013
STATUS
approved