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.

A201273 Number of n X 4 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 12
3 14
4 85
5 199
6 143
7 740
8 1274
9 759
10 3416
11 5312
12 2746
13 11628
14 16676
15 7946
16 32164
17 43438
18 19713
19 76321
20 99347
21 43137
22 162566
23 205231
24 86351
25 318364
26 391600
27 161089
28 581578
29 702330
30 282904
31 1006014
32 1195239
33 473473
34 1662549
35 1947164
36 761467
37 2641053
38 3058967

List of values

[1, 3, 12, 14, 85, 199, 143, 740, 1274, 759, 3416, 5312, 2746, 11628, 16676, 7946, 32164, 43438, 19713, 76321, 99347, 43137, 162566, 205231, 86351, 318364, 391600, 161089, 581578, 702330, 282904, 1006014, 1195239, 473473, 1662549, 1947164, 761467, 2641053, 3058967]