280512

Appears in sequences

• Number of permutations p of 1,2,...,n satisfying |p(i+6)-p(i)|<>6 for all 1<=i<=n-6.at n=8A189271
• Number of ways to place n nonattacking composite pieces rook + rider[6,6] on an n X n chessboard.at n=8A189842
• Number T(n,k) of permutations p of [n] such that |p(i+k) - p(i)| <> k for i in [n-k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=51A333706