T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once.

A268639

T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once.

Terms

    a(0) =0a(1) =3a(2) =3a(3) =12a(4) =24a(5) =12a(6) =36a(7) =120a(8) =120a(9) =36a(10) =96a(11) =504a(12) =840a(13) =504a(14) =96a(15) =240a(16) =1944a(17) =5178a(18) =5178a(19) =1944a(20) =240a(21) =576a(22) =7128a(23) =29772a(24) =47640a(25) =29772a(26) =7128a(27) =576a(28) =1344a(29) =25272

External references