A031207 - OEIS

%I #10 Feb 16 2025 08:32:36

%S 12,18,21,24,39,42,45,54,78,81,87,93,99,102,108,114,117,120,129,141,

%T 144,147,168,171,174,180,186,192,201,204,210,219,222,228,234,237,240,

%U 243,267,273,276,282,291,309,324,327,333,336,339,342,348,363

%N Numbers having period-27 7-digitized sequences.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Digitaddition.html">Digitaddition</a>

%K nonn,base,changed

%O 1,1

%A _Eric W. Weisstein_