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 A317187 #8 Jul 28 2018 00:53:15 %S A317187 2,3,13,31,67,107,173,241,347,443,577,709,877,1049,1249,1471,1697, %T A317187 1973,2243,2539,2833,3191,3541,3911,4289,4729,5179,5651,6131,6637, %U A317187 7159,7699,8293,8867,9473,10133,10799,11503,12251,12941,13709,14537,15289 %N A317187 Arrange primes along the square spiral; sequence lists primes on the X-axis. %C A317187 This is based on the square spiral with entries starting at 1 (see A317186, Examples). %D A317187 David James Sycamore, Posting to Sequence Fans Mailing List, Jul 24 2018 %F A317187 a(n) = prime(A317186(n)). %Y A317187 Cf. A317186. %K A317187 nonn %O A317187 1,1 %A A317187 _N. J. A. Sloane_, Jul 27 2018