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 A134146 #10 Aug 28 2019 17:59:37 %S A134146 1,3,1,15,3,1,105,24,3,1,945,150,24,3,1,10395,1485,177,24,3,1,135135, %T A134146 14805,1620,177,24,3,1,2027025,191520,16425,1701,177,24,3,1,34459425, %U A134146 2687580,208125,16830,1701,177,24,3,1,654729075,44552025,2880360,212985 %N A134146 Triangle of numbers obtained from the partition array A134145. %C A134146 This triangle is named S2(3)'. %C A134146 In the same manner the unsigned Lah triangle A008297 is obtained from the partition array A130561. %H A134146 W. Lang, <a href="/A134146/a134146.txt">First 10 rows and more</a>. %F A134146 a(n,m)=sum(product(S2(3;j,1)^e(n,m,q,j),j=1..n),q=1..p(n,m)) if n>=m>=1, else 0. Here p(n,m)=A008284(n,m), the number of m parts partitions of n and e(n,m,q,j) is the exponent of j in the q-th m part partition of n. S2(3;j,1)= A001147(j) = A035342(j,1) = (2*j-1)!!. %e A134146 [1]; [3,1]; [15,3,1]; [105,24,3,1]; [945,150,24,3,1];... %Y A134146 Cf. A134147 (row sums). %Y A134146 Cf. A134148 (allternating row sums). %Y A134146 Cf. A134134 (k=2 member of this triangle family). %K A134146 nonn,easy,tabl %O A134146 1,2 %A A134146 _Wolfdieter Lang_, Nov 13 2007