Number of planar maps with n edges up to orientation-preserving duality.

A054935

Number of planar maps with n edges up to orientation-preserving duality.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =33a(4) =156a(5) =1070a(6) =7515a(7) =59151a(8) =483925a(9) =4136964a(10) =36416865a(11) =329048627a(12) =3037029030a(13) =28553451498a(14) =272766018806

External references