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 A353363 #10 Apr 18 2022 17:49:53 %S A353363 1,2,6,25,38,155,235,294,322,365,390,465,528,638,646,744,765,768,867, %T A353363 884,924,946,1152,1172,1290,1421,1600,1653,1675,1677,1729,1785,1980, %U A353363 1989,2002,2028 %N A353363 Numbers k such that A046523(A332223(A332223(k))) is equal to A046523(A332223(k)). %C A353363 Numbers k such that A332223(k) is in A353308. %C A353363 If there existed any 3-perfect number (A005820) of the form x = 4u+2 and not divisible by 3, then x would be also included in A353365 and A005940(1+x) would be included in this sequence. See comments in A353365. %H A353363 <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a> %H A353363 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %Y A353363 Cf. A000203, A005940, A046523, A066961, A156552, A332223, A353365. %Y A353363 Cf. also A353308. %K A353363 nonn %O A353363 1,2 %A A353363 _Antti Karttunen_, Apr 17 2022