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.

A232368 T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.

Table of values

n a(n)
1 1
2 3
3 3
4 7
5 23
6 7
7 15
8 145
9 145
10 15
11 33
12 887
13 2411
14 887
15 33
16 73
17 5487
18 39321
19 39321
20 5487
21 73
22 161
23 33957
24 647287
25 1704619
26 647287
27 33957
28 161
29 355
30 210039
31 10652849
32 74665511
33 74665511
34 10652849
35 210039
36 355
37 783
38 1299219
39 175284259
40 3271362341

List of values

[1, 3, 3, 7, 23, 7, 15, 145, 145, 15, 33, 887, 2411, 887, 33, 73, 5487, 39321, 39321, 5487, 73, 161, 33957, 647287, 1704619, 647287, 33957, 161, 355, 210039, 10652849, 74665511, 74665511, 10652849, 210039, 355, 783, 1299219, 175284259, 3271362341]