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A055463 a(n) = a(n-1)*2*a(n-2)-3*a(n-3). 1
0, 1, 2, 4, 13, 98, 2536, 497017, 2520869930, 2505830419990012, 12633745110864184300787269, 63316045634407119326463714272245870904666, 1599837563945889048330164752080268110156603845860584259478831024272 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(3*n+1) == 1 (mod 12), a(3*n+2) == 2 (mod 12), a(3*n+3) == 4 (mod 12). - Robert Israel, Jan 18 2018

LINKS

Robert Israel, Table of n, a(n) for n = 0..17

MAPLE

A[0]:= 0: A[1]:= 1: A[2]:= 2:

for n from 3 to 17 do A[n]:= A[n-1]*2*A[n-2]-3*A[n-3] od:

seq(A[i], i=0..17); # Robert Israel, Jan 18 2018

CROSSREFS

Sequence in context: A306445 A216670 A103845 * A091957 A327443 A056678

Adjacent sequences:  A055460 A055461 A055462 * A055464 A055465 A055466

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Jul 05 2000

STATUS

approved

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Last modified September 22 17:04 EDT 2019. Contains 327311 sequences. (Running on oeis4.)