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A116530 Each term is three times the previous term. 0
20, 60, 180, 540, 1620, 4860, 14580, 43740, 131220, 393660, 1180980, 3542940, 10628820, 31886460, 95659380, 286978140, 860934420, 2582803260, 7748409780, 23245229340, 69735688020, 209207064060, 627621192180, 1882863576540 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Index entries for sequences related to linear recurrences with constant coefficients

Tanya Khovanova, Recursive Sequences

FORMULA

a(n)=10*A008776(n+1).

G.f.: 20*x/(1-3*x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 23 2008]

MATHEMATICA

Table[4*5*3^(n - 1), {n, 24}] (* Robert G. Wilson v *)

CROSSREFS

Sequence in context: A163761 A154072 A078184 * A041780 A041782 A041784

Adjacent sequences:  A116527 A116528 A116529 * A116531 A116532 A116533

KEYWORD

nonn

AUTHOR

Ben Gregson (mahishimi(AT)hotmail.com), Mar 26 2006

EXTENSIONS

More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Apr 18 2006

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Last modified February 17 09:30 EST 2012. Contains 206009 sequences.