Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.
A221307
Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.
Terms
- a(0) =0a(1) =90a(2) =0a(3) =38146a(4) =0a(5) =19642342a(6) =0a(7) =9842336697a(8) =0a(10) =0a(12) =0a(14) =0a(16) =0a(18) =0a(20) =0
External references
- oeis: A221307