OFFSET
0,2
COMMENTS
A factor in the Hankel transform A186941.
LINKS
Index entries for linear recurrences with constant coefficients, signature (9,-28,36,-16).
FORMULA
G.f.: (1-6x+16x^2-8x^3)/((1-2x)^2*(1-5x+4x^2)).
MATHEMATICA
Table[2(4^n-n 2^n)-1, {n, 0, 30}] (* or *) LinearRecurrence[{9, -28, 36, -16}, {1, 3, 15, 79}, 30] (* Harvey P. Dale, Feb 22 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Barry, Mar 01 2011
STATUS
approved