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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.

A058711 Triangle T(n,k) giving the number of loopless matroids of rank k on n labeled points (n >= 1, 1 <= k <= n).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 4
6 1
7 1
8 14
9 11
10 1
11 1
12 51
13 106
14 26
15 1
16 1
17 202
18 1232
19 642
20 57
21 1
22 1
23 876
24 22172
25 28367
26 3592
27 120
28 1
29 1
30 4139
31 803583
32 8274374
33 991829
34 19903
35 247
36 1

List of values

[1, 1, 1, 1, 4, 1, 1, 14, 11, 1, 1, 51, 106, 26, 1, 1, 202, 1232, 642, 57, 1, 1, 876, 22172, 28367, 3592, 120, 1, 1, 4139, 803583, 8274374, 991829, 19903, 247, 1]