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 A272817 #9 Jun 17 2025 17:41:00 %S A272817 0,0,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11,13,1,11,1,17,1,1,13, %T A272817 13,1,1,17,1,17,1,1,17,17,17,1,1,19,37,37,1,1,23,1,29,1,1,19,1,19,23, %U A272817 1,19,31,1,19,1,1,1,1,23,1,29,23,23,1,23,71,37 %N A272817 Distance from n-th highly composite number (cf. A002182) to nearest prime or square. %C A272817 Conjecture: Terms are either 1 or prime, n>7. - _Bill McEachen_, Jun 11 2025 %H A272817 Giovanni Resta, <a href="/A272817/b272817.txt">Table of n, a(n) for n = 1..1000</a> (based on A002182 b-file) %Y A272817 Cf. A002182, A005235, A117825, A141345. %K A272817 nonn %O A272817 1,24 %A A272817 _Vladimir Shevelev_, May 07 2016 %E A272817 a(25)-a(77) from _Giovanni Resta_, May 07 2016