Number of nX7 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.
A221418
Number of nX7 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.
Terms
- a(0) =0a(1) =696a(2) =0a(3) =2026142a(4) =0a(5) =6079373768a(6) =0a(8) =0a(10) =0a(12) =0a(14) =0a(16) =0a(18) =0
External references
- oeis: A221418