T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.

A251829

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6.

Terms

    a(0) =1890a(1) =3930a(2) =3930a(3) =9354a(4) =8674a(5) =9354a(6) =22266a(7) =28202a(8) =28202a(9) =22266a(10) =61058a(11) =75498a(12) =130826a(13) =75498a(14) =61058a(15) =160322a(16) =284506a(17) =397474a(18) =397474a(19) =284506a(20) =160322a(21) =413202a(22) =1095314a(23) =2395590a(24) =1692106a(25) =2395590a(26) =1095314a(27) =413202a(28) =1139826a(29) =3073138

External references