380941109984domain: NAppears in sequencesNumber of n X n grids with 2 non-attacking kings on each row.at n=11A389665Triangle read by rows: T(n,k) is the number of ways to place k non-attacking kings in each row of an n X n board, 0 <= k <= floor((n+1)/4) + [n=1].at n=25A390419