OFFSET
0,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (14,-55,42).
FORMULA
G.f.:1/(1-x)+1/(1-6*x)+1/(1-7*x). E.g.f.: e^x+e^(6*x)+e^(7*x). [Mohammad K. Azarian, Dec 26 2008]
a(n) = 13*a(n-1) - 42*a(n-2) + 30, n>1. [Gary Detlefs, Jun 21 2010]
a(n) = A074619(n) + 1. - Michel Marcus, Nov 11 2013
MAPLE
MATHEMATICA
Table[1 + 6^n + 7^n, {n, 0, 20}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Robert G. Wilson v, Aug 23 2002
STATUS
approved