A216491 - OEIS

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A216491

a(n) = 12*5^n.

12, 60, 300, 1500, 7500, 37500, 187500, 937500, 4687500, 23437500, 117187500, 585937500, 2929687500, 14648437500, 73242187500, 366210937500, 1831054687500, 9155273437500, 45776367187500, 228881835937500, 1144409179687500, 5722045898437500, 28610229492187500

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Table of n, a(n) for n=0..22.

Index entries for linear recurrences with constant coefficients, signature (5).

FORMULA

G.f.: 12/(1 - 5*x).

MATHEMATICA

5^Range[20]*12 (* Alonso del Arte, Sep 10 2012 *)

PROG

(PARI) for(i=0, 22, print1((12*5^i), ", "))