Number of pairings disjoint to a given pairing, and containing a given pair not in the given pairing.
A165968
Number of pairings disjoint to a given pairing, and containing a given pair not in the given pairing.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =10a(4) =68a(5) =604a(6) =6584a(7) =85048a(8) =1269680a(9) =21505552a(10) =407414816a(11) =8535396256a(12) =195927013952
External references
- oeis: A165968