Number of 3-connected Schnyder labelings with n inner faces in the quadrangular dissection, whose outer white vertices are non-isolated.
A377921
Number of 3-connected Schnyder labelings with n inner faces in the quadrangular dissection, whose outer white vertices are non-isolated.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =3a(6) =4a(7) =15a(8) =42a(9) =131a(10) =438a(11) =1467a(12) =5204a(13) =18687a(14) =69306a(15) =261473a(16) =1007328a(17) =3943155a(18) =15679474a(19) =63199785a(20) =257983836a(21) =1065186381a(22) =4444618518a(23) =18725820855a(24) =79603364236a(25) =341206137453
External references
- oeis: A377921