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 A357461 #10 Sep 30 2022 04:25:18 %S A357461 3010132125,4502334375,5065535475,6456074625,8813660625,9881746875, %T A357461 15395254875,15452011575,16874983125,18699305625,19814169375, %U A357461 19909992375,21380506875,25366375125,26643400875,26746594875,28943578125,31562182575,33074966925,34315506225,35300640375 %N A357461 Odd numbers whose number of deficient divisors is equal to their number of nondeficient divisors. %C A357461 The odd terms of A357460. %C A357461 If there are no odd perfect numbers, then this sequence is also the subsequence of the odd terms of A335543. %C A357461 The first 100 terms are all divisible by 4725 = 3^3 * 5^2 * 7. %H A357461 Amiram Eldar, <a href="/A357461/b357461.txt">Table of n, a(n) for n = 1..100</a> %o A357461 (PARI) is(n) = n%2 && sumdiv(n, d, if(sigma(d, -1) < 2, 1, -1)) == 0; %Y A357461 Subsequence of A005101, A005231 and A357460. %Y A357461 Cf. A335543. %K A357461 nonn %O A357461 1,1 %A A357461 _Amiram Eldar_, Sep 29 2022