T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal or antidiagonal neighbors.

A220632

T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal or antidiagonal neighbors.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =1a(9) =1a(10) =1a(11) =4a(12) =3a(13) =1a(14) =1a(15) =1a(16) =8a(17) =12a(18) =5a(19) =1a(20) =1a(21) =1a(22) =16a(23) =44a(24) =37a(25) =8a(26) =1a(27) =1a(28) =1a(29) =32

External references