A071587 Powers of 9 written backwards.

1, 9, 18, 927, 1656, 94095, 144135, 9692874, 12764034, 984024783, 1044876843, 90695018313, 184635924282, 9238285681452, 16945429767822, 946490231198502, 1481588810203581, 96566699618177661, 121999692536490051, 9802992767171580531, 10882965095456675121

Offset

0,2

Links

Robert Israel, Table of n, a(n) for n = 0..1046

Maple

revdigs:= proc(n) local L;
  L:= convert(n, base, 10);
  add(L[-i]*10^(i-1), i=1..nops(L))
end proc:
seq(revdigs(9^n), n=0..50); # Robert Israel, Jan 21 2020

Mathematica

IntegerReverse[9^Range[0, 20]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 26 2018 *)

Prog

(PARI) for(i=1, 50, n=9^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: A005400 A377909 A134115 * A061750 A107780 A288392

Adjacent sequences: A071584 A071585 A071586 * A071588 A071589 A071590

Keyword

easy,nonn,base

Author

Benoit Cloitre, Jun 01 2002

Status

approved