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 A126251 #11 Apr 29 2023 08:10:03 %S A126251 20,42,156,342,930,1806,3660,5256,10506,11772,19182,22650,32580,37056, %T A126251 39402,52212,57840,73170,79806,97656,121452,176820,187056,213906, %U A126251 273006,325470,360600,382542,412806,436260,656910,676506,686412,737022,778806 %N A126251 a(n) = (p+2)!/p! where p is the n-th lesser twin prime, A001359(n). %H A126251 Harvey P. Dale, <a href="/A126251/b126251.txt">Table of n, a(n) for n = 1..1000</a> %F A126251 a(n) = 2*A082669(n). %p A126251 ZL:=[]:for p from 1 to 1653 do if (isprime(p) and isprime(p+2)) then ZL:=[op(ZL),((p+2)!/p!)]; fi; od; print(ZL); %t A126251 #[[2]]!/#[[1]]!&/@Select[Partition[Prime[Range[200]],2,1],#[[2]]-#[[1]] == 2&] (* _Harvey P. Dale_, Feb 16 2020 *) %Y A126251 Cf. A001359, A082669. %Y A126251 Subsequence of A002378. %K A126251 easy,nonn %O A126251 1,1 %A A126251 _Zerinvary Lajos_, Mar 08 2007 %E A126251 Name edited by _Michel Marcus_, Apr 29 2023