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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.

A030780 a(n) is the least k such that A030777(k) = n.

Table of values

n a(n)
1 2
2 3
3 1
4 14
5 10
6 8
7 13
8 20
9 22
10 29
11 40
12 31
13 54
14 190
15 42
16 68
17 85
18 55
19 122
20 146
21 70
22 170
23 169
24 87
25 227
26 195
27 106
28 225
29 226
30 126
31 261
32 148
33 299
34 172
35 228
36 526
37 199
38 340
39 585
40 263
41 229
42 301
43 530
44 264
45 430
46 776
47 710
48 342
49 479
50 302
51 532
52 386
53 531
54 343
55 432
56 1749

List of values

[2, 3, 1, 14, 10, 8, 13, 20, 22, 29, 40, 31, 54, 190, 42, 68, 85, 55, 122, 146, 70, 170, 169, 87, 227, 195, 106, 225, 226, 126, 261, 148, 299, 172, 228, 526, 199, 340, 585, 263, 229, 301, 530, 264, 430, 776, 710, 342, 479, 302, 532, 386, 531, 343, 432, 1749]

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

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