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.

A331702 Number of distinct intersections among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.

Table of values

n a(n)
1 0
2 2
3 6
4 40
5 55
6 145
7 238
8 584
9 612
10 1350
11 1804
12 2401
13 3523
14 5180
15 6150
16 9312
17 11101
18 13645
19 17746
20 22300
21 25998
22 33462
23 39514
24 43993
25 55225
26 66976
27 74088
28 88956
29 102109
30 111841
31 133672
32 155808
33 170940
34 198798
35 220150
36 243937
37 275983
38 313728
39 338208
40 382480
41 419143
42 448561
43 507658

List of values

[0, 2, 6, 40, 55, 145, 238, 584, 612, 1350, 1804, 2401, 3523, 5180, 6150, 9312, 11101, 13645, 17746, 22300, 25998, 33462, 39514, 43993, 55225, 66976, 74088, 88956, 102109, 111841, 133672, 155808, 170940, 198798, 220150, 243937, 275983, 313728, 338208, 382480, 419143, 448561, 507658]

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

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