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 A353634 #4 May 04 2022 17:12:49
%S A353634 234728,280904,461168,463112,604136,742664,909872,996008,1065896,
%T A353634 1191944,1204424,1224392,1465256,1527656,1620008,1757288,1758536,
%U A353634 1956848,1985672,2081768,2102984,2358824,2376296,2405552,2518568,2543528,2589704,2670824,2820584,2899208,2912936,3014024,3151304,3196232,3374696,3432104
%N A353634 Nondeficient numbers k such that phi(k) = phi(sigma(k)) and A003958(k) = A003958(sigma(k)).
%H A353634 <a href="/index/O#opnseqs">Index entries for sequences where odd perfect numbers must occur, if they exist at all</a>
%H A353634 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>
%o A353634 (PARI)
%o A353634 A003958(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1]--); factorback(f); };
%o A353634 isA353634(n) = { my(s=sigma(n)); if(s<(2*n),return(0)); ((eulerphi(s)==eulerphi(n)) && (A003958(s)==A003958(n))); };
%Y A353634 Intersection of A023196 and A353635.
%Y A353634 Cf. A000010, A000203, A003958, A006872, A062401, A351440, A351442, A351446.
%K A353634 nonn
%O A353634 1,1
%A A353634 _Antti Karttunen_, May 04 2022