1/12 the number of (n+2)X9 0..2 arrays with each 3X3 subblock containing three of each value.

A184384

1/12 the number of (n+2)X9 0..2 arrays with each 3X3 subblock containing three of each value.

Terms

    a(0) =1096781a(1) =1165496a(2) =1245641a(3) =1348574a(4) =1633604a(5) =2168744a(6) =3651098

External references