T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

A268809

T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

Terms

    a(0) =3a(1) =9a(2) =9a(3) =24a(4) =34a(5) =24a(6) =60a(7) =104a(8) =104a(9) =60a(10) =144a(11) =290a(12) =332a(13) =290a(14) =144a(15) =336a(16) =772a(17) =1202a(18) =1202a(19) =772a(20) =336a(21) =768a(22) =1972a(23) =4158a(24) =5848a(25) =4158a(26) =1972a(27) =768a(28) =1728a(29) =4914

External references