This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A334145 #37 Jul 26 2020 02:23:06 %S A334145 0,1,2,3,4,5,6,7,8,9,10,11,20,21,22,30,31,33,40,41,44,50,51,55,60,61, %T A334145 66,70,71,77,80,81,88,90,91,99,100,101,110,111,121,131,132,141,142, %U A334145 151,152,161,162,171,172,181,182,191,192,200,201,202,210,212,220,221,222,231 %N A334145 a(n) = A335978(n)/9. %Y A334145 Cf. A335978. %K A334145 nonn,base %O A334145 1,3 %A A334145 _N. J. A. Sloane_, Jul 25 2020