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

A252294

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

Terms

    a(0) =943a(1) =856a(2) =976a(3) =1481a(4) =2079a(5) =3265a(6) =5676a(7) =10939a(8) =21842a(9) =45450a(10) =94429a(11) =201843a(12) =436593a(13) =950880a(14) =2077933a(15) =4556174a(16) =9995748a(17) =21960671a(18) =48283531a(19) =106217277a(20) =233735492a(21) =514456023a(22) =1132428018a(23) =2493020906a(24) =5488771613a(25) =12085003787a(26) =26609253669

External references