Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
A252420
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
Terms
- a(0) =2380a(1) =3472a(2) =11409a(3) =22038a(4) =96549a(5) =365974a(6) =715123a(7) =3213732a(8) =12306520a(9) =23990357a(10) =108709726a(11) =418711825a(12) =816544950a(13) =3711392749a(14) =14333000180a(15) =27958629647a(16) =127259409020a(17) =492098163036a(18) =960046258237
External references
- oeis: A252420