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1, 4, 16, 58, 204, 714, 2492, 8682, 30228, 105226, 366276, 1274922, 4437692, 15446554, 53765916, 187147146, 651418116, 2267444842, 7892485300, 27472040138, 95624259340, 332847482970, 1158570537292, 4032735032490, 14037083980308, 48860072772074, 170071413502180, 591982043090090, 2060562279111580, 7172374493538586, 24965494321148156, 86899520830961866, 302478557946941732, 1052862859805769450, 3664789362535367700
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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N. J. A. Sloane, On the No. of ON Cells in Cellular Automata, Video of talk in Doron Zeilberger's Experimental Math Seminar at Rutgers University, Feb. 05 2015: Part 1, Part 2
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FORMULA
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G.f.: (1-x)*(1-x+x^2-x^3-4*x^4+2*x^5-2*x^6)/(1-6*x+10*x^2-4*x^3-3*x^4+12*x^5-20*x^6+10*x^7-4*x^8).
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MATHEMATICA
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A255299[n_] := SeriesCoefficient[(1 - x)*(1 - x + x^2 - x^3 - 4*x^4 + 2*x^5 - 2*x^6)/(1 - 6*x + 10*x^2 - 4*x^3 - 3*x^4 + 12*x^5 - 20*x^6 + 10*x^7 - 4*x^8), {x, 0, n}]; Array[A255299, 35, 0] (* JungHwan Min, Sep 29 2016 *)
A255299L[n_] := CoefficientList[Series[(1 - x)*(1 - x + x^2 - x^3 - 4*x^4 + 2*x^5 - 2*x^6)/(1 - 6*x + 10*x^2 - 4*x^3 - 3*x^4 + 12*x^5 - 20*x^6 + 10*x^7 - 4*x^8), {x, 0, n}], x]; A255299L[34] (* JungHwan Min, Sep 29 2016 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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