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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.

A058116 Triangle read by rows: T(n,k) is the number of isomorphism classes of commutative semigroups of order n with k idempotents.

Table of values

n a(n)
1 1
2 2
3 1
4 5
5 5
6 2
7 16
8 23
9 14
10 5
11 62
12 106
13 93
14 49
15 15
16 342
17 544
18 582
19 422
20 200
21 53
22 3435
23 3380
24 3773
25 3360
26 2178
27 943
28 222
29 97061
30 30788
31 27222
32 26625
33 21283
34 12676
35 5072
36 1078

List of values

[1, 2, 1, 5, 5, 2, 16, 23, 14, 5, 62, 106, 93, 49, 15, 342, 544, 582, 422, 200, 53, 3435, 3380, 3773, 3360, 2178, 943, 222, 97061, 30788, 27222, 26625, 21283, 12676, 5072, 1078]