Number of (n+1)X(4+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.
A233872
Number of (n+1)X(4+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) =34416a(1) =155104a(2) =907940a(3) =6887232a(4) =57147272a(5) =530983144a(6) =5012939992a(7) =50952500976a(8) =512188465988
External references
- oeis: A233872