Number of (n+2)X(7+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.
A253043
Number of (n+2)X(7+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.
Terms
- a(0) =65765a(1) =18180a(2) =25184a(3) =51292a(4) =116466a(5) =262728a(6) =620736a(7) =1399406a(8) =3180688a(9) =7274744a(10) =16952678a(11) =38766416a(12) =88375402a(13) =204157530a(14) =467852370a(15) =1079248186a(16) =2467421138a(17) =5696126304a(18) =12988579062a(19) =30127289430a(20) =68617375036a(21) =158672004024
External references
- oeis: A253043