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 A125573 #10 Mar 17 2025 14:45:55 %S A125573 1,1,2,2,3,4,5,6,8,9,10,12,13,15,17,18,19,21,21,22,23,23,23,23,22,21, %T A125573 21,19,18,17,15,13,12,10,9,8,6,5,4,3,2,2,1,1,1 %N A125573 a(n) = number of n-digit terms with different sets of decimal digits in A108571. %F A125573 a(n) = A034139(n). - _R. J. Mathar_, Mar 17 2025 %Y A125573 Cf. A007837, A034139, A108571, A127007. %K A125573 fini,full,nonn,base,less %O A125573 1,3 %A A125573 _Zak Seidov_, Jan 02 2007