962089

Appears in sequences

• Number of ways to place 4 nonattacking kings on an n X n board.at n=9A061997
• 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=39A098487