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 A322128 #19 Nov 28 2018 08:49:05
%S A322128 1,1,2,1,1,6,1,2,2,24,1,1,1,6,120,1,2,3,12,24,720,1,1,2,6,8,120,5040,
%T A322128 1,2,2,24,24,240,720,40320,1,1,3,3,12,90,180,5040,362880,1,2,1,2,20,
%U A322128 40,60,1120,40320,3628800,1,1,2,1,4,20,24,336,8064,362880,39916800
%N A322128 Triangular array, read by rows: T(n,k) = denominator of binomial(n-1, n-k)/k!, 1 <= k <= n.
%H A322128 Seiichi Manyama, <a href="/A322128/b322128.txt">Rows n = 1..140, flattened</a>
%e A322128 See A322127.
%t A322128 T[n_, k_] := Denominator[Binomial[n-1, n-k]/k!]; Table[T[n, k], {n,1,10}, {k,1,n}] // Flatten (* _Amiram Eldar_, Nov 27 2018 *)
%Y A322128 Cf. A007318, A322093, A322127.
%K A322128 nonn,frac,tabl
%O A322128 1,3
%A A322128 _Seiichi Manyama_, Nov 27 2018