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2, 15, 113, 855, 6497, 49575, 379793, 2920695, 22542017, 174571335, 1356217073, 10567261335, 82560763937, 646644824295, 5076269583953, 39931933598775, 314707907280257, 2484430327672455, 19642812107392433, 155514083261229015
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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LINKS
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Table of n, a(n) for n=0..19.
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FORMULA
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G.f.: 1/(1-7*x)+1/(1-8*x). E.g.f.: e^(7*x)+e^(8*x). [From Mohammad K. Azarian, Jan 11 2009]
a(n)=15*a(n-1)-56*a(n-2) with a(0)=2, a(1)=15 [From Vincenzo Librandi, Jul 21 2010]
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MATHEMATICA
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Table[7^n + 8^n, {n, 0, 20}]
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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: A022026 A026113 A052874 * A031507 A207998 A052861
Adjacent sequences: A074619 A074620 A074621 * A074623 A074624 A074625
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KEYWORD
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easy,nonn
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AUTHOR
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Robert G. Wilson v, Aug 26 2002
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STATUS
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approved
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