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

A220562

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

Terms

    a(0) =1a(1) =2a(2) =1a(3) =3a(4) =5a(5) =1a(6) =5a(7) =14a(8) =13a(9) =1a(10) =8a(11) =47a(12) =64a(13) =34a(14) =1a(15) =13a(16) =149a(17) =430a(18) =292a(19) =89a(20) =1a(21) =21a(22) =481a(23) =2604a(24) =3966a(25) =1332a(26) =233a(27) =1a(28) =34a(29) =1544

External references