Number of (n+2)X7 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order.
A203920
Number of (n+2)X7 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order.
Terms
- a(0) =17800a(1) =77618a(2) =267066a(3) =916658a(4) =3191760a(5) =11082632a(6) =38569884a(7) =134316050a(8) =467816690a(9) =1629405698a(10) =5667390680a(11) =19715419592a(12) =68594753068a(13) =238634097858a(14) =830238632478
External references
- oeis: A203920