Number of n X n 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302509
Number of n X n 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =28a(4) =90a(5) =458a(6) =4558a(7) =82857a(8) =1748514a(9) =44378638a(10) =1537387012a(11) =96444437992
External references
- oeis: A302509