Number of 2Xn 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.

A280903

Number of 2Xn 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) =10a(3) =213a(4) =2292a(5) =21762a(6) =184076a(7) =1457827a(8) =11000888a(9) =80107879a(10) =567420546a(11) =3931417538a(12) =26752272278a(13) =179329108005

External references