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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(0)=1, a(1)=19, a(n)=18*a(n-1)-72*a(n-2)+1. - Vincenzo Librandi, Feb 10 2011
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MAPLE
| a:=n->sum((12^(n-j)-6^(n-j))/6, j=0..n): seq(a(n), n=1..17); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 12 2007
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CROSSREFS
| Sequence in context: A139739 A016189 A125476 * A199819 A016187 A016184
Adjacent sequences: A016245 A016246 A016247 * A016249 A016250 A016251
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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