T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.

A232459

T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =7a(4) =51a(5) =7a(6) =15a(7) =381a(8) =381a(9) =15a(10) =33a(11) =3015a(12) =8227a(13) =3015a(14) =33a(15) =73a(16) =24651a(17) =187989a(18) =187989a(19) =24651a(20) =73a(21) =161a(22) =198945a(23) =4423815a(24) =12521603a(25) =4423815a(26) =198945a(27) =161a(28) =355a(29) =1607067

External references