

A046672


Expansion of 1/(12*x3*x^2+2*x^3).


3



1, 2, 7, 18, 53, 146, 415, 1162, 3277, 9210, 25927, 72930, 205221, 577378, 1624559, 4570810, 12860541, 36184394, 101808791, 286449682, 805956949, 2267645362, 6380262207, 17951546602, 50508589101, 142111293594, 399845261287, 1125007225154
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OFFSET

0,2


LINKS

Iain Fox, Table of n, a(n) for n = 0..2226
Index entries for linear recurrences with constant coefficients, signature (2,3,2).
Richard M. Low and Ardak Kapbasov, NonAttacking Bishop and King Positions on Regular and Cylindrical Chessboards, Journal of Integer Sequences, Vol. 20 (2017), Article 17.6.1, Table 6.


FORMULA

a(n) = 2*a(n1) + 3*a(n2)  2*a(n3), n > 2.  Iain Fox, Dec 02 2017


PROG

(PARI) first(n) = Vec(1/(12*x3*x^2+2*x^3) + O(x^n)) \\ Iain Fox, Dec 02 2017


CROSSREFS

Partial sums of A054854.
Cf. A101197.
Sequence in context: A006869 A099626 A261331 * A046866 A291255 A294004
Adjacent sequences: A046669 A046670 A046671 * A046673 A046674 A046675


KEYWORD

nonn,easy,changed


AUTHOR

N. J. A. Sloane, Nov 17 2002


STATUS

approved



