Number of n X n 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
A303881
Number of n X n 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =4a(2) =11a(3) =166a(4) =1150a(5) =24985a(6) =308271a(7) =7577931a(8) =148783767a(9) =4946437814a(10) =177760275047
External references
- oeis: A303881