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 A247510 #14 Dec 23 2024 14:53:44 %S A247510 8,4,5,2,3,1,3,5,2,4,2,1,2,3,4,1,3,1,1,2,1,2,6,3,2,3,1,1,4,2,2,0,3,1, %T A247510 2,2,1,3,2,0,4,0,2,0,2,5,2,1,2,2,0,3,3,2,3,1,3,0,0,1,5,0,1,1,4,3,4,1, %U A247510 2,2,3,2,2,1,2,3,1,3,4,2,4,1,2,1,2,4,1 %N A247510 Number of preprimes of the second kind (A247393) with the smallest prime divisor equals prime(n). %H A247510 Vladimir Shevelev, <a href="https://web.archive.org/web/*/http://list.seqfan.eu/oldermail/seqfan/2014-September/013643.html">A classification of the positive integers over primes</a> %Y A247510 Cf. A000040, A156759, A247393, A247394, A247509, A247511, A247606. %K A247510 nonn %O A247510 1,1 %A A247510 _Vladimir Shevelev_, Sep 18 2014 %E A247510 More terms from _Peter J. C. Moses_, Sep 18 2014