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 A328860 #36 Feb 17 2020 09:31:59 %S A328860 993803899780063855042560,2028353759451110328141864960, %T A328860 6476620014866676143312363520 %N A328860 Numbers that are 4-imperfect. %H A328860 Douglas E. Iannucci, <a href="http://www.integers-ejcnt.org/g41/g41.Abstract.html">On a variation of perfect numbers</a>, INTEGERS: Electronic Journal of Combinatorial Number Theory, 6 (2006), #A41. %H A328860 Andrew Lelechenko, <a href="/A127724/a127724_1.txt">4-imperfect numbers</a>, Apr 19 2014. %H A328860 Michel Marcus, <a href="/A127724/a127724_2.txt">More 4-imperfect numbers</a>, Nov 07 2017. %H A328860 Michel Marcus, <a href="/A309806/a309806.gp.txt">solveIMP PARI script</a> %H A328860 Michel Marcus, <a href="/A328860/a328860.txt">List of 4-imperfect numbers</a> (including the 2 files above), last edit Jun 2019. %H A328860 Weiyi Zhou and Long Zhu, <a href="http://www.emis.de/journals/INTEGERS/papers/j1/j1.Abstract.html">On k-imperfect numbers</a>, INTEGERS: Electronic Journal of Combinatorial Number Theory, 9 (2009), #A01. %o A328860 (PARI) solveIMP(1, 4, 10^24) %Y A328860 Cf. A127724 (k-imperfect), A127725 (2-imperfect), A127726 (3-imperfect). %Y A328860 Cf. A309806 (the k values). %Y A328860 Cf. A206369 (the rho function). %K A328860 nonn,more,bref %O A328860 1,1 %A A328860 _Michel Marcus_, Feb 16 2020