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.

A233239 T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 19
6 11
7 23
8 271
9 313
10 48
11 99
12 4504
13 18744
14 6046
15 236
16 452
17 79201
18 1212549
19 1409129
20 123352
21 1248
22 2136
23 1419889
24 79794804
25 338046654
26 107709266
27 2565169
28 6896
29 10313
30 25622596
31 5267525102
32 81477098771
33 94601758339
34 8259321811

List of values

[1, 2, 3, 6, 19, 11, 23, 271, 313, 48, 99, 4504, 18744, 6046, 236, 452, 79201, 1212549, 1409129, 123352, 1248, 2136, 1419889, 79794804, 338046654, 107709266, 2565169, 6896, 10313, 25622596, 5267525102, 81477098771, 94601758339, 8259321811]