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 A140475 #18 Jul 08 2025 06:09:04 %S A140475 1,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97, %T A140475 101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181, %U A140475 191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277 %N A140475 1 along with primes greater than 3. %o A140475 (PARI) a(n)=if(n>1,prime(n+1),1) \\ _Charles R Greathouse IV_, Aug 26 2011 %Y A140475 A169611(n)=0. %K A140475 nonn,easy,less %O A140475 1,2 %A A140475 _Juri-Stepan Gerasimov_, Jul 23 2008 %E A140475 7 inserted by _R. J. Mathar_, Dec 13 2008 %E A140475 Edited by Associate Editors of the OEIS, Mar 18 2010