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.

A223765 Number of n X 3 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

Table of values

n a(n)
1 7
2 28
3 71
4 155
5 317
6 607
7 1097
8 1887
9 3112
10 4950
11 7631
12 11447
13 16763
14 24029
15 33793
16 46715
17 63582
18 85324
19 113031
20 147971
21 191609
22 245627
23 311945
24 392743
25 490484
26 607938
27 748207
28 914751
29 1111415
30 1342457
31 1612577
32 1926947
33 2291242
34 2711672

List of values

[7, 28, 71, 155, 317, 607, 1097, 1887, 3112, 4950, 7631, 11447, 16763, 24029, 33793, 46715, 63582, 85324, 113031, 147971, 191609, 245627, 311945, 392743, 490484, 607938, 748207, 914751, 1111415, 1342457, 1612577, 1926947, 2291242, 2711672]