T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.
A220621
T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =3a(4) =7a(5) =1a(6) =5a(7) =21a(8) =22a(9) =1a(10) =8a(11) =87a(12) =125a(13) =71a(14) =1a(15) =13a(16) =317a(17) =1189a(18) =765a(19) =228a(20) =1a(21) =21a(22) =1215a(23) =9176a(24) =17084a(25) =4657a(26) =733a(27) =1a(28) =34a(29) =4565
External references
- oeis: A220621