Number of ways to reciprocally link elements of an 7Xn array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
A220712
Number of ways to reciprocally link elements of an 7Xn array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =1a(2) =21a(3) =129a(4) =932a(5) =6412a(6) =44976a(7) =311193a(8) =2168111a(9) =15034974a(10) =104478616a(11) =725286308a(12) =5037269200a(13) =34977393156a(14) =242898931716
External references
- oeis: A220712