Number of rooted planar bridgeless cubic maps with 2n nodes.

A000309

Number of rooted planar bridgeless cubic maps with 2n nodes.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =24a(4) =176a(5) =1456a(6) =13056a(7) =124032a(8) =1230592a(9) =12629760a(10) =133186560a(11) =1436098560a(12) =15774990336a(13) =176028860416

External references