OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (16,-91,216,-180).
FORMULA
From Vincenzo Librandi, Mar 19 2011: (Start)
a(n) = 16*a(n-1) - 91*a(n-2) + 216*a(n-3) - 180*a(n-4), n >= 4.
a(n) = 11*a(n-1) - 30*a(n-2) + 3^(n+1) - 2^(n+1), n >= 2. (End)
a(n) = 3*6^(n+1) - 5^(n+3)/6 + 3^(n+2)/2 - 2^(n+1)/3. - R. J. Mathar, Mar 19 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved