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

A252058

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

Terms

    a(0) =125a(1) =200a(2) =383a(3) =843a(4) =1948a(5) =4569a(6) =10836a(7) =25739a(8) =61193a(9) =145794a(10) =347496a(11) =828129a(12) =1973810a(13) =4704512a(14) =11212968a(15) =26726886a(16) =63705038a(17) =151842605a(18) =361924119a(19) =862663872a(20) =2056196252a(21) =4901041429a(22) =11681865518a(23) =27844260428a(24) =66368096889

External references