Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.

A252672

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.

Terms

    a(0) =656a(1) =750a(2) =808a(3) =1010a(4) =1648a(5) =2554a(6) =4038a(7) =7108a(8) =11589a(9) =18742a(10) =33497a(11) =55048a(12) =90043a(13) =161568a(14) =265519a(15) =437213a(16) =784708a(17) =1287805a(18) =2129537a(19) =3818659a(20) =6254869a(21) =10373871a(22) =18577187a(23) =30367195a(24) =50480530a(25) =90263879a(26) =147262314a(27) =245263852a(28) =437902643

External references