Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.
A253005
Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =250a(5) =54219a(6) =14697256a(7) =5713126349
External references
- oeis: A253005