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 A368508 #5 Dec 30 2023 23:49:40 %S A368508 144,1728,20736,129600,248832,2985984,35831808,46656000,429981696, %T A368508 5159780352,5715360000,16796160000,61917364224,743008370688, %U A368508 6046617600000,8916100448256,106993205379072,432081216000000,1283918464548864,2176782336000000,15407021574586368,30497732496000000 %N A368508 Powers of superprimorials S(k)^m such that both k > 1 and m > 1, where S(n) = A006939(n). %C A368508 Proper subset of A364930, which is the intersection of A286708 and A025487, and is in turn a proper subset of A364710. This is to say, a(n) is a product of primorials and is squareful and neither squarefree nor a prime power. %H A368508 Michael De Vlieger, <a href="/A368508/b368508.txt">Table of n, a(n) for n = 1..1943</a> %t A368508 nn = 2^120; k = 2; P = 6; Q = 2 P; Union@ Reap[While[j = 2; While[Q^j < nn, Sow[Q^j]; j++]; j > 2, k++; P *= Prime[k]; Q *= P] ][[-1, 1]] %Y A368508 Cf. A002110 (squarefree kernels), A006939, A025487, A126706, A286708, A364930, A368507. %K A368508 nonn,easy %O A368508 1,1 %A A368508 _Michael De Vlieger_, Dec 28 2023