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.

A338147 Triangle read by rows: T(n,k) is the number of unoriented colorings of the edges of a regular n-D orthoplex (or ridges of a regular n-D orthotope) using exactly k colors. Row 1 has 1 column; row n>1 has 2*n*(n-1) columns.

Table of values

n a(n)
1 1
2 1
3 4
4 6
5 3
6 1
7 142
8 11682
9 310536
10 3460725
11 19870590
12 65886660
13 133585200
14 168399000
15 128898000
16 54885600
17 9979200
18 1
19 49125
20 740212980
21 730815102166
22 151600044933990
23 11420034970306170
24 415777158607920585

List of values

[1, 1, 4, 6, 3, 1, 142, 11682, 310536, 3460725, 19870590, 65886660, 133585200, 168399000, 128898000, 54885600, 9979200, 1, 49125, 740212980, 730815102166, 151600044933990, 11420034970306170, 415777158607920585]