Number of nX3 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

A221335

Number of nX3 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

Terms

    a(0) =0a(1) =20a(2) =0a(3) =790a(4) =0a(5) =34042a(6) =0a(7) =1470618a(8) =0a(9) =63526554a(10) =0a(11) =2744129114a(12) =0a(13) =118536728562a(14) =0a(16) =0a(18) =0a(20) =0a(22) =0a(24) =0a(26) =0

External references