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 A246854 #18 Sep 08 2022 08:46:09 %S A246854 1,4,26,122,146,458,746,3746,47612,16065500,388978292,5313509288, %T A246854 64278616556 %N A246854 Numbers n such that sigma(n+4) - sigma(n) = n + 4. %C A246854 Also numbers n such that A001065(n+4) = A000203(n). - _Michel Marcus_, Sep 06 2014 %C A246854 a(14) (if it exists) > 10^11. - _Hiroaki Yamanouchi_, Sep 10 2014 %C A246854 a(14) (if it exists) > 10^13. - _Giovanni Resta_, Jul 13 2015 %e A246854 Number 26 is in sequence because sigma(26+4) - sigma(26) = 72 - 42 = 30 = 26 + 4. %o A246854 (Magma) [n:n in[1..10^7] | SumOfDivisors(n+4)-SumOfDivisors(n) eq n+4] %o A246854 (PARI) %o A246854 for(n=1,10^7,if(sigma(n+4)-sigma(n)==n+4,print1(n,", "))) \\ _Derek Orr_, Sep 05 2014 %Y A246854 Cf. A000203, A067816, A246851, A246852, A246853, A246855. %K A246854 nonn,more %O A246854 1,2 %A A246854 _Jaroslav Krizek_, Sep 05 2014 %E A246854 a(10)-a(13) from _Hiroaki Yamanouchi_, Sep 10 2014