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.

A229412 T(n,k)=Number of nXk 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

Table of values

n a(n)
1 4
2 15
3 15
4 57
5 163
6 57
7 216
8 1756
9 1756
10 216
11 819
12 18712
13 53538
14 18712
15 819
16 3105
17 199595
18 1629298
19 1629298
20 199595
21 3105
22 11772
23 2127718
24 49788258
25 142475606
26 49788258
27 2127718
28 11772
29 44631
30 22684613
31 1519840402
32 12462062342

List of values

[4, 15, 15, 57, 163, 57, 216, 1756, 1756, 216, 819, 18712, 53538, 18712, 819, 3105, 199595, 1629298, 1629298, 199595, 3105, 11772, 2127718, 49788258, 142475606, 49788258, 2127718, 11772, 44631, 22684613, 1519840402, 12462062342]

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

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