159652domain: NAppears in sequencesNumber of solutions to the rook problem on a 2n X 2n board having a certain symmetry group (see Robinson for details).at n=6A000901Table T(d,n) of smallest k>1 such that binomial(k*n-1,n-1) == 1 (mod n^d), read by antidiagonals.at n=72A242166