1394519922domain: NAppears in sequencesGeneralized Bell numbers: column 4 of A275043.at n=6A061685Number A(n,k) of set partitions of [k*n] such that within each block the numbers of elements from all residue classes modulo k are equal for k>0, A(n,0)=1; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=61A275043