OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (8,-7).
FORMULA
a(n) = 7*a(n-1)-6.
a(n) = 8*a(n-1)-7*a(n-2).
G.f.: 2*(2-5*x)/((1-x)*(1-7*x)).
MATHEMATICA
LinearRecurrence[{8, -7}, {4, 22}, 20] (* Harvey P. Dale, Dec 29 2018 *)
PROG
(Magma) [3*7^n+1: n in [0..30]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 06 2011
STATUS
approved