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2, 11, 65, 407, 2657, 17831, 121745, 839927, 5830337, 40615751, 283523825, 1981521047, 13858064417, 96956119271, 678491508305, 4748635251767, 33237225536897, 232647693856391, 1628482317387185, 11399170063280087
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| G.f.: 1/(1-4*x)+1/(1-7*x). E.g.f.: e^(4*x)+e^(7*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 11 2009]
a(n)=11*a(n-1)-28*a(n-2) with a(0)=2, a(1)=11 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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MATHEMATICA
| Table[4^n + 7^n, {n, 0, 25}]
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CROSSREFS
| Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A063481, A074600 - A074624.
Sequence in context: A161947 A001565 A199412 * A039632 A143816 A160852
Adjacent sequences: A074610 A074611 A074612 * A074614 A074615 A074616
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KEYWORD
| easy,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 26 2002
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