Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300633
Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =2a(2) =13a(3) =97a(4) =1130a(5) =23097a(6) =865205a(7) =57365508a(8) =7042663221
External references
- oeis: A300633