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

0,2

Comments

Binomial transform of A086090

Links

Table of n, a(n) for n=0..21.

Index entries for linear recurrences with constant coefficients, signature (11, -40, 48).

Formula

G.f.: (1-5x+7x^2)/((1-3x)(1-4x)^2)

Crossrefs

Cf. A086092.

Sequence in context: A203155 A084153 A086314 * A081893 A106850 A284076

Adjacent sequences: A086088 A086089 A086090 * A086092 A086093 A086094

Keyword

easy,nonn

Author

Paul Barry, Jul 09 2003

Status

approved