Number of n X 2 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A281320

Number of n X 2 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =0a(1) =2a(2) =28a(3) =304a(4) =2976a(5) =27488a(6) =244544a(7) =2119168a(8) =18011136a(9) =150809088a(10) =1247857664a(11) =10226274304a(12) =83138240512a(13) =671370043392

External references