A036233 - OEIS

%I #10 Oct 24 2020 09:13:13

%S 1,1,3,1,5,3,7,1,9,5,5,3,5,7,3,1,5,9,7,20,3,20,1,3,5,20,9,1,7,3,31,5,

%T 3,20,31,9,5,1,3,7,20,42,31,7,9,20,5,42,1,31,3,7,53,9,31,20,3,5,7,42,

%U 53,1,9,64,31,42,20,53,3,1,5,9,7,64,75,31,1,42,5,20,9,53,7,3,64,86,75,20

%N Inverse Colombian function.

%C a(n) is the smallest x with n in the digit summing sequence starting with x.

%C Contains only self-numbers, see A003052.

%H Sean A. Irvine, <a href="/A036233/b036233.txt">Table of n, a(n) for n = 1..10000</a>

%H Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a036/A036233.java">Java program</a> (github)

%Y Cf. A004207, A016052, A007618, A006507, A016052.

%K easy,nonn,base

%O 1,3

%A Miklos SZABO (mike(AT)ludens.elte.hu)