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.

A339781 Number of homeomorphically irreducible trees with n integer labeled leaves covering an initial interval of positive integers.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 22
5 184
6 2278
7 37076
8 747830
9 17938120
10 498221046
11 15716127456
12 554857740936
13 21672428437044
14 927792029298550
15 43195423181912812
16 2172838098801762500
17 117433517088859845912
18 6786305674234003471552
19 417560119759063983102136
20 27254276361313006814819076

List of values

[1, 1, 2, 4, 22, 184, 2278, 37076, 747830, 17938120, 498221046, 15716127456, 554857740936, 21672428437044, 927792029298550, 43195423181912812, 2172838098801762500, 117433517088859845912, 6786305674234003471552, 417560119759063983102136, 27254276361313006814819076]

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

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