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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.

A224057 T(n,k)=Number of nXk 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing.

Table of values

n a(n)
1 3
2 9
3 9
4 22
5 54
6 22
7 46
8 218
9 218
10 46
11 86
12 698
13 1232
14 698
15 86
16 148
17 1915
18 5219
19 5219
20 1915
21 148
22 239
23 4690
24 18502
25 27246
26 18502
27 4690
28 239
29 367
30 10511
31 57911
32 115716
33 115716
34 57911
35 10511
36 367
37 541
38 21919
39 164781
40 428949
41 568107
42 428949
43 164781
44 21919
45 541

List of values

[3, 9, 9, 22, 54, 22, 46, 218, 218, 46, 86, 698, 1232, 698, 86, 148, 1915, 5219, 5219, 1915, 148, 239, 4690, 18502, 27246, 18502, 4690, 239, 367, 10511, 57911, 115716, 115716, 57911, 10511, 367, 541, 21919, 164781, 428949, 568107, 428949, 164781, 21919, 541]

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

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