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A246038
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G.f.: (1+2x)(1+2x+4x^2)/(1-3x-8x^3-8x^4).
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1
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1, 7, 29, 103, 373, 1407, 5277, 19639, 73157, 272943, 1018157, 3796839, 14159317, 52806751, 196940221, 734469911, 2739138277, 10215390607, 38097452877, 142081224135, 529879903477, 1976142458303, 7369856791005, 27485259393911, 102503957075973, 382279865222383, 1425680525146477, 5316955307198503
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OFFSET
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0,2
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COMMENTS
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This is the subsequence A246039(2^n-1), n >= 0.
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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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MAPLE
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-(2*x+1)*(4*x^2+2*x+1)/(8*x^4+8*x^3+3*x-1);
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MATHEMATICA
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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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