Number of genus 0 unsensed hypermaps with n darts.
A214821
Number of genus 0 unsensed hypermaps with n darts.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =20a(4) =57a(5) =240a(6) =954a(7) =4566a(8) =22641a(9) =121823a(10) =683307a(11) =4004055
External references
- oeis: A214821