Number of nonseparable tree-rooted planar maps with n + 4 edges and 5 vertices.

A006413

Number of nonseparable tree-rooted planar maps with n + 4 edges and 5 vertices.

Terms

    a(0) =5a(1) =210a(2) =3150a(3) =27556a(4) =170793a(5) =829920a(6) =3359356a(7) =11786190a(8) =36845718a(9) =104719524a(10) =274707420a(11) =672982128a(12) =1554007910a(13) =3407724936a(14) =7139933088a(15) =14366348780a(16) =27878652291a(17) =52364814150a(18) =95497666810a(19) =169546939380a(20) =293722986375a(21) =497527759560a(22) =825473130300

External references