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 two elements, and with new values introduced in order 0 sequentially upwards.

A280896

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 two elements, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =0a(1) =1a(2) =9a(3) =124a(4) =1464a(5) =15768a(6) =159920a(7) =1554304a(8) =14632704a(9) =134378112a(10) =1209699584a(11) =10713166848a(12) =93585811456a(13) =808068888576

External references