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.

A266423 Number of n X 3 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

Table of values

n a(n)
1 4
2 14
3 39
4 96
5 212
6 433
7 826
8 1493
9 2575
10 4270
11 6841
12 10639
13 16114
14 23845
15 34555
16 49147
17 68725
18 94637
19 128501
20 172257
21 228199
22 299035
23 387927
24 498560
25 635189
26 802719
27 1006760
28 1253717
29 1550855
30 1906400
31 2329613
32 2830904
33 3421916
34 4115651

List of values

[4, 14, 39, 96, 212, 433, 826, 1493, 2575, 4270, 6841, 10639, 16114, 23845, 34555, 49147, 68725, 94637, 128501, 172257, 228199, 299035, 387927, 498560, 635189, 802719, 1006760, 1253717, 1550855, 1906400, 2329613, 2830904, 3421916, 4115651]