cp's OEIS Frontend

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.

A165513 Trapezoidal numbers.

Table of values

n a(n)
1 5
2 7
3 9
4 11
5 12
6 13
7 14
8 15
9 17
10 18
11 19
12 20
13 21
14 22
15 23
16 24
17 25
18 26
19 27
20 29
21 30
22 31
23 33
24 34
25 35
26 36
27 37
28 38
29 39
30 40
31 41
32 42
33 43
34 44
35 45
36 46
37 47
38 48
39 49
40 50
41 51
42 52
43 53
44 54
45 55
46 56
47 57
48 58
49 59
50 60
51 61
52 62
53 63
54 65
55 66
56 67
57 68
58 69
59 70
60 71
61 72
62 73
63 74
64 75
65 76
66 77
67 78
68 79
69 80
70 81

List of values

[5, 7, 9, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81]

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

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