Number of tree-rooted planar maps with 3 vertices and n faces and no isthmuses.
A006432
Number of tree-rooted planar maps with 3 vertices and n faces and no isthmuses.
Terms
- a(0) =0a(1) =3a(2) =60a(3) =650a(4) =5352a(5) =37681a(6) =239752a(7) =1421226a(8) =7996160a(9) =43219990a(10) =226309800a(11) =1154900708a(12) =5769562736a(13) =28312118565a(14) =136830224464a(15) =652656300122
External references
- oeis: A006432