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 A057874 #9 Oct 27 2019 00:16:06 %S A057874 95,119,143,174191,175031,175871,298687992,298688708,298689424 %N A057874 Sets of three composites in bidirectional 'sum of prime factors' progression/retrogression. %C A057874 First term of next set > 2000000000. %H A057874 <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a> %e A057874 First set is (95,119,143) all terms having 'sum of prime factors' = 24. So '95' + (5+19) = '119' + (7+17) = '143' AND '143' - (11+13) = '119' - (7+17) = '95'. %Y A057874 Cf. A050780, A050781, A050703-A050710. %K A057874 nonn,hard %O A057874 0,1 %A A057874 _Patrick De Geest_, Sep 15 2000 %E A057874 This really seems to be three sequences, not one! Should be split. - _N. J. A. Sloane_