Number of n X n 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318539
Number of n X n 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =31a(4) =247a(5) =2905a(6) =46165a(7) =1143583a(8) =41368803a(9) =2165406865a(10) =168220637918
External references
- oeis: A318539