A339783 Number of homeomorphically irreducible leaf colored trees with n leaves of 3 colors.

1, 3, 6, 10, 36, 144, 706, 3774, 22140, 137096, 888522, 5950434, 40936518, 287748366, 2059386024, 14964163584, 110160504906, 820172543046, 6167144620494, 46780206203250, 357620668556700, 2753050958956812, 21327412744225182, 166164346278018822, 1301341878493196986

Offset: 0

Author

Andrew Howroyd, Dec 16 2020

Keywords

• nonn

Links

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

Crossrefs

Column k=3 of A339779.

Programs

PARI

U(25, 3) \\ See A339779 for U(n,k).