Number of (n+1)X(6+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.

A233874

Number of (n+1)X(6+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) =1128928a(1) =5878272a(2) =46051092a(3) =530983144a(4) =7353231356a(5) =117645672328

External references