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Search: id:A154410
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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
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OFFSET
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0,1
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FORMULA
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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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CROSSREFS
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Sequence in context: A086462 A003207 A095687 this_sequence A060156 A000450 A124872
Adjacent sequences: A154407 A154408 A154409 this_sequence A154411 A154412 A154413
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KEYWORD
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nonn,easy
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jan 09 2009
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EXTENSIONS
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Entries corrected and extended by Paolo P. Lava (ppl(AT)spl.at), Jan 20 2009
Comments turned into formulas by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 07 2009
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