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 A322690 #32 Feb 16 2019 21:22:05 %S A322690 1167320,1197912,1275318,1345542,3502548,3536232,3684252,3695412, %T A322690 4846520,4980792,5302638,5594622,5196000,5299680,5857830,6000150, %U A322690 5276448,5568672,5605308,5764220,6115656,6510834,6866106,6869346,6119520,6159780,6586650,6928350 %N A322690 Four-column table read by rows: Primitive distinct quadruples that have the same value of phi, sigma, and tau. %C A322690 The terms are consecutive quadruples, ordered so that (A) a(4i-3) < a(4i-2) < a(4i-1) < a(4i) for i > 0, and (B) a(4i+1) < a(4i+5) for i >= 0. This sequence has primitive terms only. If k is relatively prime to all of the terms in a primitive quadruple, then multiplying the terms in that quadruple by k gives another solution - see A322680. %H A322690 Jud McCranie, <a href="/A322690/b322690.txt">Table of n, a(n) for n = 1..4000</a> %e A322690 1167320, 1197912, 1275318, and 1345542 have the same value of phi (362880), sigma (3283200), and tau (64), so these four numbers are in the sequence. %Y A322690 Cf. A134922, A322680, A322688, A322689, A322691, A322692, A322693, A322694, A322695, A322696, A322697. %K A322690 nonn,tabf %O A322690 1,1 %A A322690 _Jud McCranie_, Dec 30 2018