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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.

A325761 Heinz numbers of integer partitions whose length is itself a part.

Table of values

n a(n)
1 1
2 2
3 6
4 9
5 15
6 20
7 21
8 30
9 33
10 39
11 45
12 50
13 51
14 56
15 57
16 69
17 70
18 75
19 84
20 87
21 93
22 105
23 110
24 111
25 123
26 125
27 126
28 129
29 130
30 140
31 141
32 159
33 165
34 170
35 175
36 176
37 177
38 183
39 189
40 190
41 195
42 196
43 201
44 210
45 213
46 219
47 230
48 237
49 245
50 249
51 255
52 264
53 267
54 275
55 285
56 290
57 291

List of values

[1, 2, 6, 9, 15, 20, 21, 30, 33, 39, 45, 50, 51, 56, 57, 69, 70, 75, 84, 87, 93, 105, 110, 111, 123, 125, 126, 129, 130, 140, 141, 159, 165, 170, 175, 176, 177, 183, 189, 190, 195, 196, 201, 210, 213, 219, 230, 237, 245, 249, 255, 264, 267, 275, 285, 290, 291]