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.

A319590 Number of binary rooted trees with n leaves spanning an initial interval of positive integers and all non-leaf nodes having out-degree 2.

Table of values

n a(n)
1 1
2 2
3 8
4 58
5 576
6 7440
7 117628
8 2201014
9 47552012
10 1164812674
11 31898271660
12 965666303078
13 32022547868872
14 1154362247246714
15 44945574393963472
16 1879720975031634318
17 84039891496643620196
18 3999886612000379135606
19 201919706444252727224852
20 10775953237291840618917900

List of values

[1, 2, 8, 58, 576, 7440, 117628, 2201014, 47552012, 1164812674, 31898271660, 965666303078, 32022547868872, 1154362247246714, 44945574393963472, 1879720975031634318, 84039891496643620196, 3999886612000379135606, 201919706444252727224852, 10775953237291840618917900]

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

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