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2, 8, 40, 224, 1312, 7808, 46720, 280064, 1679872, 10078208, 60467200, 362799104, 2176786432, 13060702208, 78364180480, 470185017344, 2821109972992, 16926659575808, 101559956930560, 609359740534784, 3656158441111552
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..200
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FORMULA
| a(n) = 6*a(n-1)-2^n = 8*a(n-1)- 12*a(n-2).
G.f.: 1/(1-2*x)+1/(1-6*x). E.g.f.: e^(2*x)+e^(6*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 02 2009]
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MATHEMATICA
| Table[2^n + 6^n, {n, 0, 22}]
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PROG
| (MAGMA) [2^n + 6^n: n in [0..35]]; // Vincenzo Librandi, Apr 30 2011
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CROSSREFS
| Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A063481, A074600 - A074624.
Sequence in context: A027282 A006195 A092807 * A052701 A151374 A177408
Adjacent sequences: A074598 A074599 A074600 * A074602 A074603 A074604
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KEYWORD
| easy,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 25 2002
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