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A155701
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a(n)=(4^n+8)/3.
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2
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3, 4, 8, 24, 88, 344, 1368, 5464, 21848, 87384, 349528, 1398104, 5592408, 22369624, 89478488, 357913944, 1431655768, 5726623064, 22906492248, 91625968984, 366503875928, 1466015503704, 5864062014808, 23456248059224, 93824992236888, 375299968947544
(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..1000
Index entries for recurrences with constant coefficients
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FORMULA
| a(n)=3+A002450(n).
a(n)= 5*a(n-1)-4*a(n-2) = 4*a(n-1)-8.
a(n) = A154879(2n) = A154890(2n) .
a(n+1)-a(n) = A000302(n).
a(n+1)=4*A047849(n) = 4*A078008(2n).
G.f.: (3-11*x)/((4*x-1)*(x-1)). [R. J. Mathar, Jul 23 2009]
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MAPLE
| A155701 := proc(n) (4^n+8)/3 ; end: seq(A155701(n), n=0..80) ; # R. J. Mathar, Jul 23 2009
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PROG
| (MAGMA) [(4^n+8)/3: n in [0..35]]; // Vincenzo Librandi, Jul 24 2011
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CROSSREFS
| Sequence in context: A204521 A073313 A168382 * A119529 A180629 A096847
Adjacent sequences: A155698 A155699 A155700 * A155702 A155703 A155704
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KEYWORD
| nonn,easy
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jan 25 2009
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EXTENSIONS
| Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 23 2009
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