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.

A223764 Number of n X 2 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

Table of values

n a(n)
1 4
2 12
3 28
4 56
5 101
6 169
7 267
8 403
9 586
10 826
11 1134
12 1522
13 2003
14 2591
15 3301
16 4149
17 5152
18 6328
19 7696
20 9276
21 11089
22 13157
23 15503
24 18151
25 21126
26 24454
27 28162
28 32278
29 36831
30 41851
31 47369
32 53417
33 60028
34 67236
35 75076
36 83584
37 92797
38 102753
39 113491
40 125051

List of values

[4, 12, 28, 56, 101, 169, 267, 403, 586, 826, 1134, 1522, 2003, 2591, 3301, 4149, 5152, 6328, 7696, 9276, 11089, 13157, 15503, 18151, 21126, 24454, 28162, 32278, 36831, 41851, 47369, 53417, 60028, 67236, 75076, 83584, 92797, 102753, 113491, 125051]