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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.

A290760 Matula-Goebel numbers of transitive rooted identity trees (or transitive finitary sets).

Table of values

n a(n)
1 1
2 2
3 6
4 30
5 78
6 330
7 390
8 870
9 1410
10 3198
11 3390
12 4290
13 7878
14 9570
15 10230
16 11310
17 13026
18 15510
19 15990
20 18330
21 26070
22 30966
23 37290
24 39390
25 40890
26 44070
27 45210
28 65130
29 84810
30 94830
31 98310
32 104610
33 122070
34 124410
35 132990
36 154830
37 159330
38 175890
39 198330
40 201630

List of values

[1, 2, 6, 30, 78, 330, 390, 870, 1410, 3198, 3390, 4290, 7878, 9570, 10230, 11310, 13026, 15510, 15990, 18330, 26070, 30966, 37290, 39390, 40890, 44070, 45210, 65130, 84810, 94830, 98310, 104610, 122070, 124410, 132990, 154830, 159330, 175890, 198330, 201630]

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

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