T(n,k) = number of ways to reciprocally link elements of an n X k array either to themselves or to exactly one king-move neighbor.

A220644

T(n,k) = number of ways to reciprocally link elements of an n X k array either to themselves or to exactly one king-move neighbor.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =3a(4) =10a(5) =3a(6) =5a(7) =40a(8) =40a(9) =5a(10) =8a(11) =172a(12) =369a(13) =172a(14) =8a(15) =13a(16) =728a(17) =3755a(18) =3755a(19) =728a(20) =13a(21) =21a(22) =3096a(23) =37320a(24) =92801a(25) =37320a(26) =3096a(27) =21a(28) =34a(29) =13152

External references