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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.

A251801 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

Table of values

n a(n)
1 150
2 1080
3 1740
4 6627
5 28932
6 19269
7 36552
8 348679
9 724300
10 216912
11 187000
12 3352272
13 17195593
14 18577404
15 2430631
16 905440
17 27291608
18 294088336
19 873945739
20 474547100
21 27278035
22 4206453
23 195753488
24 3934266515
25 26787273856
26 44356434596

List of values

[150, 1080, 1740, 6627, 28932, 19269, 36552, 348679, 724300, 216912, 187000, 3352272, 17195593, 18577404, 2430631, 905440, 27291608, 294088336, 873945739, 474547100, 27278035, 4206453, 195753488, 3934266515, 26787273856, 44356434596]

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

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