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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.

A200896 Number of nX2 0..5 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 15
2 30
3 13
4 649
5 3247
6 1483
7 84463
8 395138
9 147370
10 10892006
11 61376744
12 26060323
13 1860718688
14 9722469665
15 3689916515
16 298977508446
17 1746612244800
18 731620635705
19 56300135952299
20 307084986199367
21 118048036603381

List of values

[15, 30, 13, 649, 3247, 1483, 84463, 395138, 147370, 10892006, 61376744, 26060323, 1860718688, 9722469665, 3689916515, 298977508446, 1746612244800, 731620635705, 56300135952299, 307084986199367, 118048036603381]

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

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