1220298

Appears in sequences

• Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square array such that all positions are mutually isolated. Two positions (s,t),(u,v) are considered as isolated from each other if min(abs(s-u),abs(t-v))>1.at n=26A098487
• Number of ways to place 6 nonattacking kings on an n X n board.at n=6A172158
• Triangle read by rows: T(n,k) = number of ways to place k nonattacking kings on an n X n board.at n=41A193580