cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A339782 Number of homeomorphically irreducible leaf colored trees with n leaves of 2 colors.

Table of values

n a(n)
0 1
1 2
2 3
3 4
4 11
5 30
6 105
7 380
8 1555
9 6650
10 30091
11 140592
12 677396
13 3336280
14 16752485
15 85444832
16 441757114
17 2310561412
18 12208670550
19 65088056150
20 349773085560
21 1893030193232
22 10311145350621
23 56489805467868
24 311113902447810
25 1721697849252838
26 9569947189448379
27 53410284955104654

List of values

[1, 2, 3, 4, 11, 30, 105, 380, 1555, 6650, 30091, 140592, 677396, 3336280, 16752485, 85444832, 441757114, 2310561412, 12208670550, 65088056150, 349773085560, 1893030193232, 10311145350621, 56489805467868, 311113902447810, 1721697849252838, 9569947189448379, 53410284955104654]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.