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.

A200772 Number of nX3 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Table of values

n a(n)
1 2
2 5
3 13
4 31
5 77
6 217
7 553
8 1438
9 3849
10 9634
11 24872
12 65658
13 165619
14 425229
15 1108871
16 2787741
17 7090082
18 18273124
19 45935694
20 116433625
21 297919225
22 747625324
23 1886048964
24 4791865798
25 11998842755
26 30184656867
27 76352766306
28 190890209361

List of values

[2, 5, 13, 31, 77, 217, 553, 1438, 3849, 9634, 24872, 65658, 165619, 425229, 1108871, 2787741, 7090082, 18273124, 45935694, 116433625, 297919225, 747625324, 1886048964, 4791865798, 11998842755, 30184656867, 76352766306, 190890209361]

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

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