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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.

A223999 T(n,k)=Number of nXk 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

Table of values

n a(n)
1 3
2 6
3 9
4 10
5 31
6 27
7 15
8 76
9 157
10 81
11 21
12 155
13 476
14 793
15 243
16 28
17 281
18 1144
19 2980
20 4004
21 729
22 36
23 469
24 2403
25 7927
26 18672
27 20216
28 2187
29 45
30 736
31 4614
32 17929
33 55333
34 117386
35 102069
36 6561
37 55
38 1101
39 8291
40 36845
41 132119
42 388598
43 739672
44 515338
45 19683
46 66

List of values

[3, 6, 9, 10, 31, 27, 15, 76, 157, 81, 21, 155, 476, 793, 243, 28, 281, 1144, 2980, 4004, 729, 36, 469, 2403, 7927, 18672, 20216, 2187, 45, 736, 4614, 17929, 55333, 117386, 102069, 6561, 55, 1101, 8291, 36845, 132119, 388598, 739672, 515338, 19683, 66]

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

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