Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.

A252110

Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.

Terms

    a(0) =1600a(1) =584a(2) =776a(3) =1314a(4) =1956a(5) =2658a(6) =4488a(7) =7248a(8) =10632a(9) =17952a(10) =28992a(11) =42528a(12) =71808a(13) =115968a(14) =170112a(15) =287232a(16) =463872a(17) =680448a(18) =1148928a(19) =1855488a(20) =2721792a(21) =4595712a(22) =7421952a(23) =10887168a(24) =18382848a(25) =29687808a(26) =43548672a(27) =73531392a(28) =118751232

External references