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.

A223920 Number of 3Xn 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

Table of values

n a(n)
1 10
2 100
3 666
4 3311
5 13347
6 45988
7 140236
8 387671
9 988447
10 2354539
11 5291652
12 11307388
13 23115717
14 45438234
15 86243127
16 158615577
17 283521156
18 493809754
19 839915122
20 1397838161
21 2280164963
22 3651068140
23 5746477482
24 8900889311

List of values

[10, 100, 666, 3311, 13347, 45988, 140236, 387671, 988447, 2354539, 5291652, 11307388, 23115717, 45438234, 86243127, 158615577, 283521156, 493809754, 839915122, 1397838161, 2280164963, 3651068140, 5746477482, 8900889311]