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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.

A201276 Number of n X 7 0..2 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)
0 1
1 3
2 27
3 54
4 740
5 2827
6 3113
7 27008
8 71704
9 59070
10 408600
11 894812
12 621910
13 3704174
14 7087046
15 4373879
16 23558696
17 41171126
18 23396689
19 116650532
20 190010902
21 101247815
22 476808796
23 736407602
24 373431803
25 1678517670
26 2482516953
27 1208979602
28 5235742304
29 7477415626

List of values

[1, 3, 27, 54, 740, 2827, 3113, 27008, 71704, 59070, 408600, 894812, 621910, 3704174, 7087046, 4373879, 23558696, 41171126, 23396689, 116650532, 190010902, 101247815, 476808796, 736407602, 373431803, 1678517670, 2482516953, 1208979602, 5235742304, 7477415626]

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

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