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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.

A370135 Triangle read by rows: T(n,k) = (A002110(n) + A002110(k)) / A002110(k), 1 <= k <= n.

Table of values

n a(n)
1 2
2 4
3 2
4 16
5 6
6 2
7 106
8 36
9 8
10 2
11 1156
12 386
13 78
14 12
15 2
16 15016
17 5006
18 1002
19 144
20 14
21 2
22 255256
23 85086
24 17018
25 2432
26 222
27 18
28 2
29 4849846
30 1616616
31 323324
32 46190
33 4200
34 324
35 20
36 2
37 111546436
38 37182146
39 7436430
40 1062348
41 96578
42 7430
43 438
44 24
45 2
46 3234846616
47 1078282206
48 215656442
49 30808064
50 2800734
51 215442
52 12674
53 668
54 30
55 2

List of values

[2, 4, 2, 16, 6, 2, 106, 36, 8, 2, 1156, 386, 78, 12, 2, 15016, 5006, 1002, 144, 14, 2, 255256, 85086, 17018, 2432, 222, 18, 2, 4849846, 1616616, 323324, 46190, 4200, 324, 20, 2, 111546436, 37182146, 7436430, 1062348, 96578, 7430, 438, 24, 2, 3234846616, 1078282206, 215656442, 30808064, 2800734, 215442, 12674, 668, 30, 2]

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

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