1395857215domain: NAppears in sequencesa(n) = 1/exp(1) * Sum_{k>=0} (k+n)!^2 / k!^3.at n=6A069948Triangle of certain generalized Bell numbers.at n=41A090210Number of set partitions of unique elements from an n X 6 matrix where elements from the same row may not be in the same partition.at n=2A283155