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1, 3, 21, 153, 1041, 6753, 42561, 263553, 1614081, 9815553, 59417601, 358602753, 2160005121, 12993585153, 78095728641, 469111242753, 2816814940161, 16909479575553, 101491237191681, 609084862103553, 3655058928435201
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| G.f.: 1/(1-6*x)-1/(1-4*x)+1/(1-x). E.g.f.: e^(6*x)-e^(4*x)+e^x.
a(n)=10*a(n-1)-24*a(n-2)+15 with a(0)=1, a(1)=3 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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EXAMPLE
| For n=2, a(2)=10*3-24*1+15=21; n=3, a(3)=10*21-24*3+15=153 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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CROSSREFS
| A155596, A155597, A155598, A155599, A155600, A155601, A155622, A155623, A155624, A155625, A155626
Sequence in context: A074577 A007566 A183412 * A163472 A074575 A091171
Adjacent sequences: A155624 A155625 A155626 * A155628 A155629 A155630
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KEYWORD
| nonn
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AUTHOR
| Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 29 2009
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