

A160411


Number of cells turned "ON" at nth stage of A160117.


8



1, 8, 4, 28, 8, 52, 12, 76, 16, 100, 20, 124, 24, 148, 28, 172, 32, 196, 36, 220, 40, 244, 44, 268, 48, 292, 52, 316, 56, 340, 60, 364, 64, 388, 68, 412, 72, 436, 76, 460, 80, 484, 84, 508, 88, 532, 92, 556, 96
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OFFSET

1,2


COMMENTS

First differences of A160117.
It appears that one of the bisections is A008574.  Omar E. Pol, Sep 20 2011


LINKS

Table of n, a(n) for n=1..49.
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for sequences related to cellular automata
Index entries for linear recurrences with constant coefficients, signature (0,2,0,1).


FORMULA

G.f.: x*(x^2+1)*(4*x^3 + x^2 + 8*x + 1) / ((x1)^2*(x+1)^2).  Colin Barker, Mar 04 2013
From Colin Barker, Apr 06 2013: (Start)
a(n) = 11  9*(1)^n + (7 + 5*(1)^n)*n for n > 2.
a(n) = 2*a(n2)  a(n4) for n > 6. (End)


CROSSREFS

Cf. A139251, A160117, A160411, A160413, A160415.
Sequence in context: A173855 A143368 A160415 * A033473 A238163 A213773
Adjacent sequences: A160408 A160409 A160410 * A160412 A160413 A160414


KEYWORD

nonn,easy


AUTHOR

Omar E. Pol, Jun 13 2009


EXTENSIONS

a(10)a(27) from Omar E. Pol, Mar 26 2011
More terms from Colin Barker, Apr 06 2013


STATUS

approved



