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A154410
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5*(3*6^n+2^n)/2.
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2
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10, 50, 280, 1640, 9760, 58400, 350080, 2099840, 12597760, 75584000, 453498880, 2720983040, 16325877760, 97955225600, 587731271680, 3526387466240, 21158324469760, 126949946163200, 761699675668480, 4570198051389440, 27421188303093760
(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
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FORMULA
| a(n) = 8*a(n-1)-12*a(n-2) = 6*a(n-1)-10*2^(n-1).
a(n)= A154407(n+1)-A154407(n).
a(n)=10*A090040(n).
G.f.: 10*(1-3*x)/((1-2*x)*(1-6*x)) [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Aug 30 2009]
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PROG
| (MAGMA) [5*(3*6^n+2^n)/2: n in [0..30]]; // Vincenzo Librandi, Aug 07 2011
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CROSSREFS
| Sequence in context: A003207 A095687 A204272 * A060156 A000450 A124872
Adjacent sequences: A154407 A154408 A154409 * A154411 A154412 A154413
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KEYWORD
| nonn,easy
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jan 09 2009
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EXTENSIONS
| Entries corrected and extended by Paolo P. Lava (paoloplava(AT)gmail.com), Jan 20 2009
Comments turned into formulas by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 07 2009
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