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.

A210608 Number of intersections after n-th stage in the structure mentioned in A210606 using semicircumferences and counting the superposed intersections several times.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 1
6 1
7 1
8 2
9 2
10 3
11 3
12 4
13 4
14 5
15 5
16 6
17 6
18 6
19 6
20 7
21 7
22 8
23 14
24 22
25 28
26 36
27 43

List of values

[0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 8, 14, 22, 28, 36, 43]