Number of rooted 2-connected 4-regular planar maps, which may have loops, with n inner faces.

A318101

Number of rooted 2-connected 4-regular planar maps, which may have loops, with n inner faces.

Terms

    a(0) =2a(1) =9a(2) =30a(3) =154a(4) =986a(5) =6977a(6) =52590a(7) =415678a(8) =3409032a(9) =28787498a(10) =248930292a(11) =2195238596a(12) =19682012382a(13) =178974809121

External references