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

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), ", "))

Crossrefs

Cf. A000351, A114307.

Sequence in context: A074433 A280175 A373134 * A114307 A009031 A009136

Adjacent sequences: A216488 A216489 A216490 * A216492 A216493 A216494

Keyword

nonn,easy

Author

V. Raman, Sep 07 2012

Status

approved