OFFSET
0,2
LINKS
FORMULA
a(n) = (12^(n+1) - 7^(n+1))/5. - Lambert Klasen (lambert.klasen(AT)gmx.net), Feb 06 2005
a(n) = 12*a(n-1) + 7^n, a(0)=1. - Vincenzo Librandi, Feb 09 2011
a(n) = 19*a(n-1) - 84*a(n-2), a(0)=1, a(1)=19. - Vincenzo Librandi, Feb 09 2011
MATHEMATICA
Join[{a=1, b=19}, Table[c=19*b-84*a; a=b; b=c, {n, 40}]] (* Vladimir Joseph Stephan Orlovsky, Feb 14 2011 *)
CoefficientList[Series[1/((1-7x)(1-12x)), {x, 0, 20}], x] (* or *) LinearRecurrence[ {19, -84}, {1, 19}, 20] (* Harvey P. Dale, Jul 09 2018 *)
PROG
(PARI) Vec(1/((1-7*x)*(1-12*x))+O(x^99)) \\ Charles R Greathouse IV, Sep 26 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved