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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.

A191857 Second factor in happy factorization of n-th rhombic number.

Table of values

n a(n)
1 3
2 1
3 4
4 11
5 5
6 19
7 1
8 6
9 27
10 1
11 2
12 7
13 20
14 43
15 1
16 8
17 51
18 59
19 9
20 67
21 1
22 3
23 1
24 10
25 83
26 29
27 22
28 7
29 2
30 11
31 1
32 52
33 107
34 23
35 1
36 12
37 123
38 1
39 2
40 131
41 5
42 4
43 139
44 13
45 1
46 38
47 53
48 2
49 163
50 1
51 14
52 171
53 25
54 8
55 179
56 187
57 1
58 2
59 15
60 1
61 100
62 26
63 211
64 5
65 54
66 3
67 1
68 16
69 227
70 77

List of values

[3, 1, 4, 11, 5, 19, 1, 6, 27, 1, 2, 7, 20, 43, 1, 8, 51, 59, 9, 67, 1, 3, 1, 10, 83, 29, 22, 7, 2, 11, 1, 52, 107, 23, 1, 12, 123, 1, 2, 131, 5, 4, 139, 13, 1, 38, 53, 2, 163, 1, 14, 171, 25, 8, 179, 187, 1, 2, 15, 1, 100, 26, 211, 5, 54, 3, 1, 16, 227, 77]

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

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