|
%I #3 Mar 30 2012 18:50:54
%S 0,1,2,3,2,3,6,3,4,9,4,5,6,3,4,9,4,5,18,7,8,9,4,5,12,5,6,27,10,11,12,
%T 5,6,15,6,7,18,7,8,9,4,5,12,5,6,27,10,11,12,5,6,15,6,7,54,19,20,21,8,
%U 9,24,9,10,27,10,11,12,5,6,15,6,7,36,13,14,15,6,7,18,7,8,81,28,29,30,11,12
%N a(0) = 0, a(n) = (1+2*0^(n mod 3))*a(floor(n/3)) + n mod 3.
%C a(0) = 0, a(3*n) = 3*a(n), a(3*n+i) = a(n)+i with 1<=i<=2;
%C A118089(n) = Min{m: a(m) = n}.
%Y Cf. A087808.
%K nonn
%O 0,3
%A _Reinhard Zumkeller_, Apr 12 2006
|
