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A085280 Expansion of (1-4x+x^2)/((1-x)(1-3x)(1-4x)). 2
1, 4, 14, 48, 166, 584, 2094, 7648, 28406, 107064, 408574, 1575248, 6123846, 23963944, 94261454, 372262848, 1474702486, 5855763224, 23293912734, 92788230448, 369990660326, 1476475856904, 5895443074414, 23550391238048 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Binomial transform of A085279.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..300

FORMULA

a(n) = 3^n+4^n/3-1/3.

MATHEMATICA

Table[(3^n + 4^n/3 - 1/3), {n, 0, 30}] (* Vincenzo Librandi, May 26 2013 *)

PROG

(MAGMA) [3^n+4^n/3-1/3: n in [0..30]]; // Vincenzo Librandi, May 26 2013

CROSSREFS

Sequence in context: A071753 A071757 A082590 * A007851 A014325 A047028

Adjacent sequences:  A085277 A085278 A085279 * A085281 A085282 A085283

KEYWORD

nonn,easy

AUTHOR

Paul Barry, Jun 25 2003

STATUS

approved

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Last modified August 13 04:54 EDT 2020. Contains 336442 sequences. (Running on oeis4.)