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A016248
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Expansion of 1/((1-x)(1-6x)(1-12x)).
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0
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1, 19, 271, 3511, 43687, 533575, 6458887, 77842567, 936126343, 11245609351, 135019871623, 1620673815943, 19450697930119, 233424047994247, 2801182612927879, 33614755577116039, 403380452257281415
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = (5*12^(n+2) - 11*6^(n+2) + 6)/330. [Yahia Kahloune, Aug 13 2013]
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MAPLE
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a:=n->sum((12^(n-j)-6^(n-j))/6, j=0..n): seq(a(n), n=1..17); # Zerinvary Lajos, Jan 12 2007
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PROG
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(PARI) a(n) = (5*12^(n+2) - 11*6^(n+2) + 6)/330; \\ Joerg Arndt, Aug 13 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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