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.

A292230 Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes such that the maximum of the node outdegrees equals four.

Table of values

n a(n)
4 1
5 2
6 7
7 22
8 72
9 230
10 751
11 2442
12 8006
13 26280
14 86604
15 285994
16 946866
17 3140812
18 10438300
19 34747649
20 115849084
21 386779317
22 1292998720
23 4327654320
24 14500841169
25 48639319376
26 163308287353
27 548820437392
28 1845999502151
29 6214297279692
30 20935992503127
31 70586182742450

List of values

[1, 2, 7, 22, 72, 230, 751, 2442, 8006, 26280, 86604, 285994, 946866, 3140812, 10438300, 34747649, 115849084, 386779317, 1292998720, 4327654320, 14500841169, 48639319376, 163308287353, 548820437392, 1845999502151, 6214297279692, 20935992503127, 70586182742450]

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

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