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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.

A209736 T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having distinct edge sums.

Table of values

n a(n)
1 22
2 124
3 124
4 696
5 1096
6 696
7 3912
8 9712
9 9712
10 3912
11 21976
12 86744
13 137888
14 86744
15 21976
16 123480
17 775096
18 1995752
19 1995752
20 775096
21 123480
22 693752
23 6933120
24 28927984
25 47572464
26 28927984
27 6933120
28 693752
29 3897880
30 62007896
31 420545824

List of values

[22, 124, 124, 696, 1096, 696, 3912, 9712, 9712, 3912, 21976, 86744, 137888, 86744, 21976, 123480, 775096, 1995752, 1995752, 775096, 123480, 693752, 6933120, 28927984, 47572464, 28927984, 6933120, 693752, 3897880, 62007896, 420545824]

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

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