Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9.

A251647

Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9.

Terms

    a(0) =738a(1) =1928a(2) =4522a(3) =9918a(4) =31022a(5) =74194a(6) =163318a(7) =509054a(8) =1221194a(9) =2704574a(10) =8386814a(11) =20177362a(12) =44950790a(13) =138592654a(14) =334384234a(15) =749470958a(16) =2296746062a(17) =5557738322a(18) =12535135958a(19) =38171299294a(20) =92650542218a(21) =210319394398a(22) =636286353118

External references