T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

A269201

T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

Terms

    a(0) =4a(1) =16a(2) =16a(3) =60a(4) =180a(5) =64a(6) =216a(7) =1284a(8) =1740a(9) =256a(10) =756a(11) =9612a(12) =25572a(13) =15540a(14) =1024a(15) =2592a(16) =68052a(17) =400428a(18) =471492a(19) =132300a(20) =4096a(21) =8748a(22) =472044a(23) =5877228a(24) =15289548a(25) =8314020a(26) =1090740a(27) =16384a(28) =29160a(29) =3212820

External references