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A155638 11^n+5^n-1^n 21
1, 15, 145, 1455, 15265, 164175, 1787185, 19565295, 214749505, 2359900815, 25947190225, 285360498735, 3138672517345, 34523932847055, 379755937098865, 4177278686993775, 45949882451462785, 505447791438746895 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Index to sequences with linear recurrences with constant coefficients, signature (17,-71,55).

FORMULA

G.f.: 1/(1-11*x)+1/(1-5*x)-1/(1-x). E.g.f.: e^(11*x)+e^(5*x)-e^x.

a(n)=16*a(n-1)-55*a(n-2)-40 with a(0)=1, a(1)=15 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]

CROSSREFS

Cf. A155624, A155625, A155626, A155627, A155628, A155629, A155630, A155631, A155632, A155633, A155634, A155635, A155636, A155637

Sequence in context: A026893 A163799 A025440 * A069417 A051272 A021414

Adjacent sequences:  A155635 A155636 A155637 * A155639 A155640 A155641

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 30 2009

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.