Number of unrooted loopless n-edge maps in the plane (planar with a distinguished outside face).
A103941
Number of unrooted loopless n-edge maps in the plane (planar with a distinguished outside face).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =103a(6) =614a(7) =3872a(8) =26414a(9) =186988a(10) =1367976a(11) =10254326a(12) =78461338a(13) =610598818a(14) =4821248244a(15) =38546510368a(16) =311560875422
External references
- oeis: A103941