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A155594 10^n+2^n-1^n. 17
1, 11, 103, 1007, 10015, 100031, 1000063, 10000127, 100000255, 1000000511, 10000001023, 100000002047, 1000000004095, 10000000008191, 100000000016383, 1000000000032767, 10000000000065535, 100000000000131071 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

G.f.: 1/(1-10*x)+1/(1-2*x)-1/(1-x). E.g.f.: e^(10*x)+e^(2*x)-e^x.

a(n)=12*a(n-1)-20*a(n-2)-9 with a(0)=1, a(1)=11 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]

CROSSREFS

Cf. A074501; A074600; A005057; A005056; A099393; A155588; A155590; A155592; A155593

Sequence in context: A156948 A141915 A016133 * A077250 A173851 A158470

Adjacent sequences:  A155591 A155592 A155593 * A155595 A155596 A155597

KEYWORD

nonn

AUTHOR

Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 24 2009

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Last modified February 13 20:19 EST 2012. Contains 205553 sequences.