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 A072826 #23 Dec 03 2020 06:59:44 %S A072826 2,3,5,7,13,37,61,181,241,2521,7561,15121,20161,45361,55441,110881, %T A072826 332641,498961,4324321,14414401,43243201,110270161,183783601, %U A072826 367567201,4655851201,13967553601,73329656401,293318625601,1606268664001 %N A072826 Primes p such that p-1 is a highly composite number. %H A072826 Amiram Eldar, <a href="/A072826/b072826.txt">Table of n, a(n) for n = 1..431</a> (terms below 10^1000; terms 1..300 from T. D. Noe) %H A072826 Benny Lim, <a href="https://www.parabola.unsw.edu.au/files/articles/2010-2019/volume-54-2018/issue-3/vol54_no3_4.pdf">Prime Numbers Generated From Highly Composite Numbers</a>, Parabola Magazine, volume 54, issue 3, 2018. %F A072826 a(n) = A002182(A306587(n)) + 1. - _Amiram Eldar_, Dec 03 2020 %e A072826 13 is a term because it is a prime such that 13-1=12 is a highly composite number. %Y A072826 Cf. A002182 (highly composite numbers), A072828 (with p+1 instead), A306587. %K A072826 nonn %O A072826 1,1 %A A072826 _Shyam Sunder Gupta_, Jul 21 2002