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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.

A371663 a(n) is the number of sides of simple polygons (sorted in ascending order) for which one or more arithmetic sequences can be formed from all their interior angles (all integer, in degrees).

Table of values

n a(n)
1 3
2 4
3 5
4 6
5 8
6 9
7 10
8 12
9 15
10 16
11 18
12 20
13 24
14 30
15 36
16 40
17 45
18 48
19 60
20 72
21 80
22 90
23 120
24 144
25 180
26 240
27 360

List of values

[3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360]

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

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