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 A282407 #10 May 23 2021 02:55:32 %S A282407 741841,1633213,1889467,1946677,2210557,2440203,2655427,2660857, %T A282407 2729091,2749273,2774911,3077323,3724909,3977473,4021507,4030891, %U A282407 4323301,4372337,4408581,4421713,4608574,4640419,4836223,5640861,5691531,6148599,6166101,6429853,6786523 %N A282407 Semiprimes p such that next semiprime after p is p + 40. %C A282407 Note that a(1) = 741841 = A131109(40). %C A282407 Smallest difference between two consecutive terms occurs first at a(22060) = 1141901643 because a(22061) = 1141901683 = 1141901643 + 40. %H A282407 Zak Seidov, <a href="/A282407/b282407.txt">Table of n, a(n) for n = 1..23671</a> %o A282407 (PARI) is(p) = if(bigomega(p)==2 && bigomega(p+40)==2, for(i=p+1, p+39, if(bigomega(i)==2, return(0))); 1); \\ _Jinyuan Wang_, May 23 2021 %Y A282407 Cf. A001358, A131109, A217030, A217335, A217357. %K A282407 nonn %O A282407 1,1 %A A282407 _Zak Seidov_, Feb 14 2017