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A071583 Powers of 5 written backwards. 2

%I

%S 1,5,52,521,526,5213,52651,52187,526093,5213591,5265679,52182884,

%T 526041442,5213070221,5265153016,52187571503,526098785251,

%U 521354939267,5265627964183,52182368437091,52604613476359,521302851738674

%N Powers of 5 written backwards.

%H Alois P. Heinz, <a href="/A071583/b071583.txt">Table of n, a(n) for n = 0..1000</a>

%p a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||(5^n)):

%p seq(a(n), n=0..50); # _Alois P. Heinz_, Apr 09 2015

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

%o (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)))),","))

%K easy,nonn,base

%O 0,2

%A _Benoit Cloitre_, Jun 01 2002

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Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)