Number of 3-connected Schnyder labelings with n inner faces in the quadrangular dissection.

A377920

Number of 3-connected Schnyder labelings with n inner faces in the quadrangular dissection.

Terms

    a(0) =0a(1) =0a(2) =3a(3) =2a(4) =3a(5) =6a(6) =14a(7) =36a(8) =102a(9) =306a(10) =972a(11) =3216a(12) =11050a(13) =39138a(14) =142446a(15) =530656a(16) =2018352a(17) =7818864a(18) =30792396a(19) =123075000a(20) =498564768a(21) =2044416718a(22) =8477328954a(23) =35513219388a(24) =150179868736a(25) =640638311244

External references