Number of connected chainmails with n unlabeled elements.
A374073
Number of connected chainmails with n unlabeled elements.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =62a(6) =303a(7) =1842a(8) =14073a(9) =134802
External references
- oeis: A374073