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A160411 Number of cells turned "ON" at n-th stage of A160117. 8

%I

%S 1,8,4,28,8,52,12,76,16,100,20,124,24,148,28,172,32,196,36,220,40,244,

%T 44,268,48,292,52,316,56,340,60,364,64,388,68,412,72,436,76,460,80,

%U 484,84,508,88,532,92,556,96

%N Number of cells turned "ON" at n-th stage of A160117.

%C First differences of A160117.

%C It appears that one of the bisections is A008574. - _Omar E. Pol_, Sep 20 2011

%H N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>

%H <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,2,0,-1).

%F G.f.: x*(x^2+1)*(4*x^3 + x^2 + 8*x + 1) / ((x-1)^2*(x+1)^2). - _Colin Barker_, Mar 04 2013

%F From _Colin Barker_, Apr 06 2013: (Start)

%F a(n) = -11 - 9*(-1)^n + (7 + 5*(-1)^n)*n for n > 2.

%F a(n) = 2*a(n-2) - a(n-4) for n > 6. (End)

%Y Cf. A139251, A160117, A160411, A160413, A160415.

%K nonn,easy

%O 1,2

%A _Omar E. Pol_, Jun 13 2009

%E a(10)-a(27) from _Omar E. Pol_, Mar 26 2011

%E More terms from _Colin Barker_, Apr 06 2013

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Last modified July 12 05:35 EDT 2020. Contains 335658 sequences. (Running on oeis4.)