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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.

A052894 a(n) is the number of Schröder trees on n vertices with a prescribed root.

Table of values

n a(n)
0 1
1 1
2 5
3 46
4 631
5 11586
6 267369
7 7442758
8 242833091
9 9090987610
10 384209125453
11 18096001098462
12 939991769248239
13 53388611049236386
14 3291647968944928337
15 218948960832551848438
16 15629052780600654123739
17 1191728692751208814306986
18 96675526164560545405689141

List of values

[1, 1, 5, 46, 631, 11586, 267369, 7442758, 242833091, 9090987610, 384209125453, 18096001098462, 939991769248239, 53388611049236386, 3291647968944928337, 218948960832551848438, 15629052780600654123739, 1191728692751208814306986, 96675526164560545405689141]

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

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