a(n) is the number of rooted 2-connected triangular maps on the projective plane with n vertices.
A316698
a(n) is the number of rooted 2-connected triangular maps on the projective plane with n vertices.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =18a(4) =261a(5) =3539a(6) =46695a(7) =608526a(8) =7884661a(9) =101905839a(10) =1316047599a(11) =16998339587a(12) =219699143367
External references
- oeis: A316698