Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.
A304920
Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =4a(2) =15a(3) =87a(4) =1054a(5) =21214a(6) =649029a(7) =33757130a(8) =2831764125a(9) =388624884126
External references
- oeis: A304920