A086091 3^n+3n4^(n-1).
1, 6, 33, 171, 849, 4083, 19161, 88203, 399777, 1789155, 7923369, 34780155, 151526385, 655905747, 2823355257, 12093944427, 51582654273, 219172472259, 928100356425, 3918172435419, 16496161201041, 69279692903091
Offset: 0
Links
- Index entries for linear recurrences with constant coefficients, signature (11, -40, 48).
Crossrefs
Cf. A086092.
Formula
G.f.: (1-5x+7x^2)/((1-3x)(1-4x)^2)
Comments