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 A048412 #19 Apr 22 2025 16:25:45 %S A048412 0,1,2,3,11,26,111,1111,11111,111111,1111111,11111111,111111111 %N A048412 a(n)^2 is a square whose consecutive digits differ by 1. %C A048412 a(14), if it exists, is > 10^17. - _Lars Blomberg_, Nov 25 2016 %C A048412 a(14), if it exists, is > 10^26. - _Michael S. Branicky_, Apr 22 2025 %F A048412 a(n) = sqrt(A048411(n)). %Y A048412 Cf. A002477, A048411. %K A048412 nonn,base,more %O A048412 1,3 %A A048412 _Patrick De Geest_, Apr 15 1999 %E A048412 Offset changed to 1 by _Jinyuan Wang_, Sep 04 2021