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1, 15, 129, 1071, 8961, 75855, 649089, 5606511, 48811521, 427774095, 3769259649, 33358386351, 296270823681, 2638754838735, 23555015527809, 210638693604591, 1886253119421441, 16909812213653775, 151723048894909569
(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/(1-7*x)-1/(1-x). E.g.f.: e^(9*x)+e^(7*x)-e^x.
a(n)=16*a(n-1)-63*a(n-2)-48 with a(0)=1, a(1)=15 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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CROSSREFS
| A155638, A155639, A155640, A155641, A155642, A155643, A155644, A155645, A155646, A155647, A155648, A155649, A155650, A155651, A155652, A155653, A155654, A155655
Sequence in context: A127595 A056579 A156922 * A201138 A027630 A027629
Adjacent sequences: A155653 A155654 A155655 * A155657 A155658 A155659
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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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