Number of (n+1)X(5+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21.

A233873

Number of (n+1)X(5+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21.

Terms

    a(0) =189632a(1) =909408a(2) =6146640a(3) =57147272a(4) =608085728a(5) =7353231356a(6) =91827779048

External references