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 A309171 #11 Sep 08 2022 08:46:21
%S A309171 1,1,1,7,1,2790,1,216027,3025,21730275,1,143362465643243568744,1,
%T A309171 404056132480,500592722458920,12056706465173227408551,1,
%U A309171 99260615209905051640711424376160950,1,105138504356810366747790360523498652392500,143413971571112402506500,768149712982621155186
%N A309171 a(n) = Product_{d|n} Stirling2(n,d).
%t A309171 Table[Product[StirlingS2[n, d], {d, Divisors[n]}], {n, 1, 22}]
%o A309171 (PARI) a(n) = my(d=divisors(n)); prod(k=1, #d, stirling(n, d[k], 2)); \\ _Michel Marcus_, Jul 16 2019
%o A309171 (Magma) [(&*[StirlingSecond(n,d): d in Divisors(n)]): n in [1..30]]; // _Vincenzo Librandi_, Jul 16 2019
%Y A309171 Cf. A008277, A008578 (positions of 1's), A058808, A308037, A309169.
%K A309171 nonn
%O A309171 1,4
%A A309171 _Ilya Gutkovskiy_, Jul 15 2019