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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.

A341762 The number of vertices on a 2 by 1 ellipse formed by the straight line segments mutually connecting all points formed by dividing the ellipse into 2n equal angle sectors from its origin.

Table of values

n a(n)
1 2
2 5
3 19
4 65
5 195
6 461
7 971
8 1737
9 2995
10 4617
11 7203
12 10385
13 14779
14 20125
15 27155
16 35481
17 46051
18 58277
19 73395
20 90323
21 111403
22 134765
23 162539
24 193385
25 229515
26 269301
27 315331
28 365617
29 423195
30 485617
31 556603
32 633145
33 719299
34 811845
35 915275
36 1025921
37 1148811
38 1279757
39 1424395
40 1577723
41 1746803

List of values

[2, 5, 19, 65, 195, 461, 971, 1737, 2995, 4617, 7203, 10385, 14779, 20125, 27155, 35481, 46051, 58277, 73395, 90323, 111403, 134765, 162539, 193385, 229515, 269301, 315331, 365617, 423195, 485617, 556603, 633145, 719299, 811845, 915275, 1025921, 1148811, 1279757, 1424395, 1577723, 1746803]

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

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