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.

A201448 Number of nX5 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Table of values

n a(n)
1 4
2 56
3 246
4 261
5 4544
6 22324
7 45532
8 32314
9 313710
10 1126721
11 1675002
12 879801
13 7177332
14 20808117
15 25958138
16 11930250
17 83429402
18 215418299
19 242046848
20 99077372
21 640294388
22 1516885224
23 1571234990
24 603846146
25 3627055278

List of values

[4, 56, 246, 261, 4544, 22324, 45532, 32314, 313710, 1126721, 1675002, 879801, 7177332, 20808117, 25958138, 11930250, 83429402, 215418299, 242046848, 99077372, 640294388, 1516885224, 1571234990, 603846146, 3627055278]

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

Content is available under The OEIS End-User License Agreement.