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1, 11, 89, 755, 6641, 59291, 532169, 4785155, 43053281, 387440171, 3486843449, 31381236755, 282430067921, 2541867422651, 22876797237929, 205891146443555, 1853020231898561, 16677181828806731, 150094635684419609
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| G.f.: 1/(1-9*x)+1/(1-3*x)-1/(1-x). E.g.f.: e^(9*x)+e^(3*x)-e^x.
a(n)=12*a(n-1)-27*a(n-2)-16 with a(0)=1, a(1)=11 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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CROSSREFS
| A155596, A155597, A155598, A155599, A155600, A155601, A155602, A155603, A155604, A155605, A155606
Sequence in context: A201117 A081657 A037580 * A110252 A199394 A171470
Adjacent sequences: A155604 A155605 A155606 * A155608 A155609 A155610
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KEYWORD
| nonn
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AUTHOR
| Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 25 2009
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