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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.

A175009 Triangle read by rows, antidiagonals of an array formed from variants of A001318, generalized pentagonal numbers.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 3
6 5
7 1
8 4
9 9
10 7
11 1
12 5
13 13
14 13
15 12
16 1
17 6
18 17
19 19
20 23
21 15
22 1
23 7
24 21
25 25
26 34
27 29
28 22
29 1
30 8
31 25
32 31
33 45
34 43
35 43
36 26
37 1
38 9
39 29
40 37
41 56
42 57
43 64
44 51
45 35
46 1
47 10
48 33
49 43
50 67
51 71
52 85
53 76
54 69
55 40
56 1
57 11
58 37
59 49
60 78
61 85
62 106
63 101
64 103
65 79
66 51

List of values

[1, 1, 2, 1, 3, 5, 1, 4, 9, 7, 1, 5, 13, 13, 12, 1, 6, 17, 19, 23, 15, 1, 7, 21, 25, 34, 29, 22, 1, 8, 25, 31, 45, 43, 43, 26, 1, 9, 29, 37, 56, 57, 64, 51, 35, 1, 10, 33, 43, 67, 71, 85, 76, 69, 40, 1, 11, 37, 49, 78, 85, 106, 101, 103, 79, 51]

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

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