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 A348471 #17 Oct 29 2021 09:10:09 %S A348471 5,7,11,13,17,19,22,23,26,29,31,34,37,38,39,41,43,46,47,51,53,57,58, %T A348471 59,61,62,67,68,69,71,73,74,76,79,82,83,86,87,89,92,93,94,97,101,103, %U A348471 106,107,109,111,113,115,116,118,122,123,124,125,127,129,131,134,137,139,141 %N A348471 One half of the even numbers without middle divisors. %C A348471 One half of the even numbers k such that the symmetric representation of sigma(k) has an even number of parts. %F A348471 a(n) = A319802(n)/2. %Y A348471 First differs from A101550 at a(57). %Y A348471 A subsequence is A320048 from which first differs at a(51). %Y A348471 Cf. A071561, A237270, A237271, A237593, A244894, A319802. %K A348471 nonn %O A348471 1,1 %A A348471 _Omar E. Pol_, Oct 19 2021