A342055 Number of unrooted 3-connected triangulations of a hexagon with n interior nodes.

1, 3, 20, 140, 1089, 8796, 72204, 596906, 4958736, 41365110, 346477770, 2914165157, 24612003577, 208711039484, 1776879432103, 15185140895506, 130242884479498, 1120949733518971, 9679158242220797, 83836374509942511, 728279201686023394, 6344019713842496995

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..500

Crossrefs

Column k=6 of A342053.

Cf. A341926.

Sequence in context: A073514 A163065 A082143 * A371411 A009156 A074573

Adjacent sequences: A342052 A342053 A342054 * A342056 A342057 A342058

Keyword

nonn

Author

Andrew Howroyd, Feb 26 2021

Status

approved