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 A282424 #11 May 23 2021 02:55:40 %S A282424 1226777,4732631,5093729,9210671,12515461,12917989,16121409,16183253, %T A282424 16698881,17263069,19418903,23003807,24534161,26519563,26726659, %U A282424 27625067,29605299,29772471,32655031,34027277,34366179,35340719,37570683,38117319,38687461,39038399,39479381 %N A282424 Semiprimes p such that next semiprime after p is p + 50. %C A282424 All terms are odd because even semiprime 2*p plus 50 = 2*(p+25) is multiple of 4 and not semiprime. %C A282424 Note that a(1) = 1226777 = A131109(50). %C A282424 Smallest possible difference is 50 but among first 10000 terms %C A282424 the least difference 100 is between a(325) = 228601303 and a(326) = 228601403. %H A282424 Zak Seidov, <a href="/A282424/b282424.txt">Table of n, a(n) for n = 1..10000</a> %o A282424 (PARI) lista(nn) = my(r); for(k=1, nn, if(bigomega(k)==2, if(k-r==50, print1(r, ", ")); r=k)); \\ _Jinyuan Wang_, May 23 2021 %Y A282424 Cf. A001358, A131109, A217030, A217335, A217357, A282407. %K A282424 nonn %O A282424 1,1 %A A282424 _Zak Seidov_, Feb 14 2017