T(n,k)=Number of nXk 0..6 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling six exactly once.

A269937

T(n,k)=Number of nXk 0..6 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling six exactly once.

Terms

    a(0) =0a(1) =7a(2) =7a(3) =84a(4) =900a(5) =84a(6) =756a(7) =36312a(8) =36312a(9) =756a(10) =6048a(11) =1213836a(12) =5695536a(13) =1213836a(14) =6048a(15) =45360a(16) =36926640a(17) =755009274a(18) =755009274a(19) =36926640a(20) =45360a(21) =326592a(22) =1064495604a(23) =91506078732a(24) =399002850360a(25) =91506078732a(26) =1064495604a(27) =326592a(28) =2286144

External references