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.

A233202 T(n,k)=Number of nXk 0..7 arrays with no element x(i,j) adjacent to itself or value 7-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 4 5 and 6, 2 appearing before 3 4 and 5, and 3 appearing before 4 in row major order (unlabelled 8-colorings with no clashing color pairs).

Table of values

n a(n)
1 1
2 1
3 1
4 3
5 3
6 3
7 11
8 36
9 36
10 11
11 48
12 528
13 1440
14 528
15 48
16 236
17 8256
18 62720
19 62720
20 8256
21 236
22 1248
23 131328
24 2779136
25 7802880
26 2779136
27 131328
28 1248
29 6896
30 2098176
31 123551744
32 981532672
33 981532672
34 123551744
35 2098176
36 6896
37 39168
38 33558528

List of values

[1, 1, 1, 3, 3, 3, 11, 36, 36, 11, 48, 528, 1440, 528, 48, 236, 8256, 62720, 62720, 8256, 236, 1248, 131328, 2779136, 7802880, 2779136, 131328, 1248, 6896, 2098176, 123551744, 981532672, 981532672, 123551744, 2098176, 6896, 39168, 33558528]

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

Content is available under The OEIS End-User License Agreement.