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8, 343, 1728, 4913, 10648, 19683, 32768, 50653, 74088, 103823, 140608, 185193, 238328, 300763, 373248, 456533, 551368, 658503, 778688, 912673, 1061208, 1225043, 1404928, 1601613, 1815848, 2048383
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OFFSET
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0,1
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LINKS
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FORMULA
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a(0)=8, a(1)=343, a(2)=1728, a(3)=4913, a(n)=4*a(n-1)-6*a(n-2)+ 4*a(n-3)- a(n-4). - Harvey P. Dale, Apr 30 2013
G.f.: ( 8+311*x+404*x^2+27*x^3 ) / (x-1)^4 . - R. J. Mathar, Dec 03 2015
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MATHEMATICA
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(5*Range[0, 30]+2)^3 (* or *) LinearRecurrence[{4, -6, 4, -1}, {8, 343, 1728, 4913}, 30] (* Harvey P. Dale, Apr 30 2013 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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