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.

A338148 Triangle read by rows: T(n,k) is the number of chiral pairs of 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 0
2 0
3 0
4 3
5 3
6 0
7 74
8 10482
9 303268
10 3440700
11 19842840
12 65867760
13 133580160
14 168399000
15 128898000
16 54885600
17 9979200
18 0
19 40927
20 731157018
21 729348051686
22 151526009158620
23 11418355290999750
24 415756294427389020
25 8643340000393019040

List of values

[0, 0, 0, 3, 3, 0, 74, 10482, 303268, 3440700, 19842840, 65867760, 133580160, 168399000, 128898000, 54885600, 9979200, 0, 40927, 731157018, 729348051686, 151526009158620, 11418355290999750, 415756294427389020, 8643340000393019040]