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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.

A209297 Triangle read by rows: T(n,k) = k*n + k - n, 1 <= k <= n.

Table of values

n a(n)
1 1
2 1
3 4
4 1
5 5
6 9
7 1
8 6
9 11
10 16
11 1
12 7
13 13
14 19
15 25
16 1
17 8
18 15
19 22
20 29
21 36
22 1
23 9
24 17
25 25
26 33
27 41
28 49
29 1
30 10
31 19
32 28
33 37
34 46
35 55
36 64
37 1
38 11
39 21
40 31
41 41
42 51
43 61
44 71
45 81
46 1
47 12
48 23
49 34
50 45
51 56
52 67
53 78
54 89
55 100
56 1
57 13
58 25
59 37
60 49
61 61
62 73
63 85
64 97
65 109
66 121
67 1
68 14
69 27

List of values

[1, 1, 4, 1, 5, 9, 1, 6, 11, 16, 1, 7, 13, 19, 25, 1, 8, 15, 22, 29, 36, 1, 9, 17, 25, 33, 41, 49, 1, 10, 19, 28, 37, 46, 55, 64, 1, 11, 21, 31, 41, 51, 61, 71, 81, 1, 12, 23, 34, 45, 56, 67, 78, 89, 100, 1, 13, 25, 37, 49, 61, 73, 85, 97, 109, 121, 1, 14, 27]

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

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