Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 or 4.

A252286

Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 or 4.

Terms

    a(0) =564a(1) =1130a(2) =2525a(3) =5910a(4) =14042a(5) =33171a(6) =79607a(7) =192757a(8) =466820a(9) =1139785a(10) =2794089a(11) =6859899a(12) =16916803a(13) =41819189a(14) =103493568a(15) =256675271a(16) =637537134a(17) =1584780098a(18) =3943709283a(19) =9822330752a(20) =24476360165a(21) =61027931196a(22) =152237787148a(23) =379887999122

External references