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

A269097

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

Terms

    a(0) =0a(1) =4a(2) =4a(3) =24a(4) =96a(5) =24a(6) =108a(7) =1152a(8) =1152a(9) =108a(10) =432a(11) =11424a(12) =31296a(13) =11424a(14) =432a(15) =1620a(16) =103488a(17) =715320a(18) =715320a(19) =103488a(20) =1620a(21) =5832a(22) =889056a(23) =15024096a(24) =37963968a(25) =15024096a(26) =889056a(27) =5832a(28) =20412a(29) =7375872

External references