Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.

A252301

Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.

Terms

    a(0) =2670a(1) =1992a(2) =2287a(3) =3032a(4) =5117a(5) =7489a(6) =10626a(7) =18971a(8) =28579a(9) =41037a(10) =74183a(11) =112451a(12) =162093a(13) =294327a(14) =447155a(15) =645357a(16) =1173623a(17) =1784435a(18) =2576493a(19) =4688247a(20) =7130483a(21) =10297197a(22) =18741623a(23) =28508531a(24) =41172333a(25) =74944887a(26) =114008435a(27) =164657517

External references