1589752230

Appears in sequences

• Column 1 of triangle A121412, in which row n of T equals row (n-1) of T^(n+1) with an appended '1'.at n=9A121413
• Square array, read by antidiagonals, where T(n,k) = T(n,k-1) + T(n-1,k+n+1) for n>0, k>0, such that T(n,0) = T(n-1,n+1) for n>0 with T(0,k)=1 for k>=0.at n=45A136737