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.

A223843 Number of 7 X n 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

Table of values

n a(n)
1 8
2 64
3 342
4 1356
5 4325
6 11749
7 28369
8 62869
9 130891
10 260219
11 499470
12 932402
13 1701094
14 3042926
15 5348741
16 9253153
17 15773146
18 26518532
19 44008367
20 72142211
21 116895662
22 187337832
23 297106834
24 466531024
25 725652569
26 1118500677
27 1709080380
28 2589696200
29 3892426882
30 5804817830

List of values

[8, 64, 342, 1356, 4325, 11749, 28369, 62869, 130891, 260219, 499470, 932402, 1701094, 3042926, 5348741, 9253153, 15773146, 26518532, 44008367, 72142211, 116895662, 187337832, 297106834, 466531024, 725652569, 1118500677, 1709080380, 2589696200, 3892426882, 5804817830]