A361238 Number of nonequivalent noncrossing 4-gonal cacti with n polygons up to rotation.

1, 1, 1, 8, 63, 664, 7462, 90896, 1159587, 15369761, 209785576, 2933152208, 41833725570, 606735330572, 8926655086328, 132969013796640, 2002168332793035, 30435351234214599, 466570991414368225, 7206553709798780480, 112066631802051120600, 1753396593921234013664

Offset: 0

Author

Andrew Howroyd, Mar 05 2023

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..500

Crossrefs

Column 4 of A361236.

Cf. A361241.