Number of n-fold branched coverings of the projective plane with r cyclic branch points (n,r>=1); array read by downward antidiagonals.
A113949
Number of n-fold branched coverings of the projective plane with r cyclic branch points (n,r>=1); array read by downward antidiagonals.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =2a(5) =1a(6) =1a(7) =0a(8) =3a(9) =0a(10) =1a(11) =2a(12) =5a(13) =8a(14) =1a(15) =1a(16) =0a(17) =11a(18) =0a(19) =16a(20) =0a(21) =1a(22) =2a(23) =21a(24) =128a(25) =232a(26) =64a(27) =1a(28) =1a(29) =0
External references
- oeis: A113949