T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

A269214

T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

Terms

    a(0) =0a(1) =4a(2) =0a(3) =24a(4) =96a(5) =0a(6) =108a(7) =768a(8) =1152a(9) =0a(10) =432a(11) =6528a(12) =18048a(13) =11424a(14) =0a(15) =1620a(16) =49536a(17) =308544a(18) =361728a(19) =103488a(20) =0a(21) =5832a(22) =360960a(23) =4744704a(24) =12548544a(25) =6712704a(26) =889056a(27) =0a(28) =20412a(29) =2546304

External references