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.

A261070 Irregular triangle read by rows: T(n,k) is the number of arrangements of n circles with 2k intersections (using the same rules as A250001).

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 4
5 4
6 2
7 4
8 9
9 15
10 15
11 31
12 24
13 35
14 44
15 20
16 50

List of values

[1, 1, 2, 1, 4, 4, 2, 4, 9, 15, 15, 31, 24, 35, 44, 20, 50]