cp's OEIS Frontend

A028903 Map n = Sum c_i 10^i to a(n) = Sum c_i 8^i.

%I A028903 #9 Jul 08 2025 18:55:13
%S A028903 0,1,2,3,4,5,6,7,8,9,8,9,10,11,12,13,14,15,16,17,16,17,18,19,20,21,22,
%T A028903 23,24,25,24,25,26,27,28,29,30,31,32,33,32,33,34,35,36,37,38,39,40,41,
%U A028903 40,41,42,43,44,45,46,47,48,49,48,49,50,51,52,53,54,55,56,57,56,57,58,59
%N A028903 Map n = Sum c_i 10^i to a(n) = Sum c_i 8^i.
%p A028903 A028903 := proc(n)
%p A028903     convert(n,base,10) ;
%p A028903     add(op(i,%) *8^(i-1),i=1..nops(%) ) ;
%p A028903 end proc:
%p A028903 seq(A028903(n),n=0..100) ; # _R. J. Mathar_, May 25 2023
%K A028903 nonn,base
%O A028903 0,3
%A A028903 _N. J. A. Sloane_
%E A028903 More terms from _Erich Friedman_.