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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.

A223918 T(n,k)=Number of nXk 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

Table of values

n a(n)
1 3
2 9
3 6
4 22
5 36
6 10
7 46
8 158
9 100
10 15
11 86
12 548
13 666
14 225
15 21
16 148
17 1600
18 3311
19 2111
20 441
21 28
22 239
23 4102
24 13347
25 14123
26 5548
27 784
28 36
29 367
30 9503
31 45988
32 74040
33 48182
34 12752
35 1296
36 45
37 541
38 20299
39 140236
40 323394
41 319156
42 139925
43 26494
44 2025
45 55
46 771
47 40570

List of values

[3, 9, 6, 22, 36, 10, 46, 158, 100, 15, 86, 548, 666, 225, 21, 148, 1600, 3311, 2111, 441, 28, 239, 4102, 13347, 14123, 5548, 784, 36, 367, 9503, 45988, 74040, 48182, 12752, 1296, 45, 541, 20299, 140236, 323394, 319156, 139925, 26494, 2025, 55, 771, 40570]

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

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