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 A211679 #15 Oct 07 2021 13:52:40 %S A211679 6,28,6,28,496,84,270,1488,1638,84,270,1488,1638,24384,210,17360, %T A211679 43400,284480,2229500,2886100,3780,66960,167400,406224,1097280, %U A211679 6656832,13035330,3780,66960,167400,406224,1097280,6656832,13035330,29410290 %N A211679 Triangle of earliest friendly numbers having n friends. %C A211679 Row n contains the earliest set of friendly numbers of length n. The sequence A211677 contains the last element of each row. %H A211679 Donovan Johnson, <a href="/A211679/b211679.txt">Table of n, a(n) for n = 2..45</a> %Y A211679 Cf. A074902 (friendly numbers), A211677. %K A211679 nonn,tabf,hard %O A211679 2,1 %A A211679 _T. D. Noe_, May 10 2012