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1, 16, 144, 1240, 10656, 91816, 793584, 6880120, 59823936, 521638216, 4560526224, 39970994200, 351149013216, 3091621642216, 27274838966064, 241075504183480, 2134495165562496, 18928981513351816, 168109033806481104
(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/(1-8*x)-1/(1-x). E.g.f.: e^(9*x)+e^(8*x)-e^x.
a(n)=17*a(n-1)-72*a(n-2)-56 with a(0)=1, a(1)=16 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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CROSSREFS
| A155646, A155647, A155648, A155649, A155650, A155651, A155652, A155653, A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661, A155662
Sequence in context: A054851 A000762 A086952 * A077485 A131705 A203538
Adjacent sequences: A155660 A155661 A155662 * A155664 A155665 A155666
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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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