OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (40,-595,3900,-9504)
FORMULA
a(n) = 40*a(n-1) - 595*a(n-2) + 3900*a(n-3) - 9504*a(n-4), n>=4. - Vincenzo Librandi, Mar 17 2011
a(n) = 23*a(n-1) - 132*a(n-2) + 9^(n+1) - 8^(n+1), n>=2 . - Vincenzo Librandi, Mar 17 2011
a(n) = 12^(n+2) -2*8^(n+2)/3 - 11^(n+3)/6 + 3*9^(n+2)/2. - R. J. Mathar, Mar 18 2011
MATHEMATICA
CoefficientList[Series[1/((1-8x)(1-9x)(1-11x)(1-12x)), {x, 0, 30}], x] (* Harvey P. Dale, Apr 26 2013 *)
PROG
(Magma) m:=20; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R!(1/((1-8*x)*(1-9*x)*(1-11*x)*(1-12*x)))); // Vincenzo Librandi, Jun 24 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved