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.

A202808 Number of n X 4 nonnegative integer arrays with each row and column increasing from zero by 0, 1 or 2.

Table of values

n a(n)
1 1
2 10
3 121
4 1177
5 8232
6 43483
7 185051
8 666610
9 2105474
10 5980085
11 15560519
12 37618385
13 85418437
14 183739050
15 377000959
16 742024924
17 1407514167
18 2583094972
19 4601680965
20 7980089529
21 13504273038
22 22347278077
23 36230162235
24 57638635054

List of values

[1, 10, 121, 1177, 8232, 43483, 185051, 666610, 2105474, 5980085, 15560519, 37618385, 85418437, 183739050, 377000959, 742024924, 1407514167, 2583094972, 4601680965, 7980089529, 13504273038, 22347278077, 36230162235, 57638635054]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.