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 A093912 #17 Dec 15 2016 10:41:55
%S A093912 1,2,3,4,6,10,20,40,80,160,308,628,1256,2488,5000,9940,19928,39864,
%T A093912 79660,159380,318724,637496,1274980,2549924,5099884,10199748,20399528,
%U A093912 40799020,81598052,163196124,326392240,652784444,1305568896,2611137796
%N A093912 Number of terms in n-th row of irregular triangle defined in A093911.
%C A093912 First differences of A093911.
%e A093912 From _Michael De Vlieger_, Dec 15 2016: (Start)
%e A093912 a(4) = 4 because a(1) is the product of 1 successive numbers starting with 1 = 1, a(2) is the product of 2 successive numbers (2,3) = 6, a(3) is the product of 3 successive numbers (4,5,6) = 120. Finally, a(4) is the product of 4 successive numbers (7,8,9,10) = 5040. All the products have the property that a(n) = 0 (mod a(n - 1)). Thus a(4) = 4. (End)
%t A093912 a = {{1, 1}, {2, 2}}; Do[k = Last@ a[[i]]; While[! Divisible[Pochhammer[Total@ a[[i]], k], Pochhammer @@ a[[i]]], k++]; AppendTo[a, {Total@ a[[i]], k}], {i, 2, 16}]; Last /@ a (* _Michael De Vlieger_, Dec 15 2016 *)
%Y A093912 Cf. A090906, A093911.
%K A093912 nonn,easy,less
%O A093912 1,2
%A A093912 _Amarnath Murthy_, Apr 24 2004
%E A093912 Edited and extended by _David Wasserman_, Mar 27 2006