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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.

A222953 T(n,k)=Number of nXk 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.

Table of values

n a(n)
1 4
2 0
3 0
4 0
5 212
6 0
7 0
8 2256
9 2256
10 0
11 0
12 36302
13 125664
14 36302
15 0
16 0
17 455904
18 8579208
19 8579208
20 455904
21 0
22 0
23 6471572
24 436075392
25 3084748094
26 436075392
27 6471572
28 0
29 0
30 84040156
31 25670781880
32 690124074740
33 690124074740
34 25670781880
35 84040156
36 0
37 0

List of values

[4, 0, 0, 0, 212, 0, 0, 2256, 2256, 0, 0, 36302, 125664, 36302, 0, 0, 455904, 8579208, 8579208, 455904, 0, 0, 6471572, 436075392, 3084748094, 436075392, 6471572, 0, 0, 84040156, 25670781880, 690124074740, 690124074740, 25670781880, 84040156, 0, 0]

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

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