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Search: id:A074604
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| 2, 11, 85, 737, 6577, 59081, 531505, 4783097, 43046977, 387421001, 3486785425, 31381061657, 282429540577, 2541865836521, 22876792471345, 205891132127417, 1853020188917377, 16677181699797641, 150094635297261265
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OFFSET
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0,1
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FORMULA
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a(n) = 9a(n-1)-2^n = 11a(n-1)- 18a(n-2).
G.f.: 1/(1-2*x)+1/(1-9*x). E.g.f.: e^(2*x)+e^(9*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 02 2009]
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MATHEMATICA
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Table[2^n + 9^n, {n, 0, 25}]
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CROSSREFS
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Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A063481, A074600 - A074624.
Sequence in context: A086406 A158098 A104185 this_sequence A135404 A151360 A153304
Adjacent sequences: A074601 A074602 A074603 this_sequence A074605 A074606 A074607
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KEYWORD
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easy,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 25 2002
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