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1, 12, 84, 558, 3696, 24582, 164304, 1103478, 7444416, 50431302, 342941424, 2340123798, 16018069536, 109949704422, 756587236944, 5217746494518, 36054040477056, 249557173431942, 1729973554578864, 12008254925383638
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| G.f.: 1/(1-7*x)+1/(1-6*x)-1/(1-x). E.g.f.: e^(7*x)+e^(6*x)-e^x.
a(n)=13*a(n-1)-42*a(n-2)-30 with a(0)=1, a(1)=12 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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CROSSREFS
| A155628, A155629, A155630, A155631, A155632, A155633, A155634, A155635, A155636, A155637, A155638, A155639, A155640, A155641, A155642, A155643, A155644
Sequence in context: A000761 A174079 A003209 * A095267 A118017 A098206
Adjacent sequences: A155642 A155643 A155644 * A155646 A155647 A155648
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KEYWORD
| nonn
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AUTHOR
| Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 31 2009
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