A071583 Powers of 5 written backwards.

1, 5, 52, 521, 526, 5213, 52651, 52187, 526093, 5213591, 5265679, 52182884, 526041442, 5213070221, 5265153016, 52187571503, 526098785251, 521354939267, 5265627964183, 52182368437091, 52604613476359, 521302851738674

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Maple

a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||(5^n)):
seq(a(n), n=0..50);  # Alois P. Heinz, Apr 09 2015

Mathematica

IntegerReverse/@(5^Range[0, 30]) (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 15 2017 *)

Prog

(PARI) for(i=1, 50, n=5^i; s=ceil(log(n)/log(10)); print1(sum(i=0, s, 10^(s-i-1)*(floor(n/10^i)-10*floor(n/10^(i+1)))), ", "))

Crossrefs

Sequence in context: A247777 A193809 A134111 * A099881 A280063 A363356

Adjacent sequences: A071580 A071581 A071582 * A071584 A071585 A071586

Keyword

easy,nonn,base

Author

Benoit Cloitre, Jun 01 2002

Status

approved