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 A007308 M4832 #25 Apr 20 2025 02:03:16 %S A007308 1,12,30,427 %N A007308 Erroneous version of A383108. %C A007308 Included in accordance with OEIS policy of including published but erroneous sequences to serve as pointers to the correct values. %D A007308 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %K A007308 dead %O A007308 0,2