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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.

A133289 Riordan matrix T from A084358 (lists of sets of lists) inverse to the Riordan matrix TI = 2I-A129652 formed from A000262 (number of sets of lists) and reciprocal under a partition transform.

Table of values

n a(n)
0 1
1 1
2 1
3 5
4 2
5 1
6 37
7 15
8 3
9 1
10 363
11 148
12 30
13 4
14 1
15 4441
16 1815
17 370
18 50
19 5
20 1
21 65133
22 26646
23 5445
24 740
25 75
26 6
27 1
28 1114009
29 455931
30 93261
31 12705
32 1295
33 105
34 7
35 1
36 21771851
37 8912072
38 1823724
39 248696
40 25410
41 2072
42 140
43 8
44 1

List of values

[1, 1, 1, 5, 2, 1, 37, 15, 3, 1, 363, 148, 30, 4, 1, 4441, 1815, 370, 50, 5, 1, 65133, 26646, 5445, 740, 75, 6, 1, 1114009, 455931, 93261, 12705, 1295, 105, 7, 1, 21771851, 8912072, 1823724, 248696, 25410, 2072, 140, 8, 1]