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.

A202247 Number of zero-sum -3..3 arrays of n elements with adjacent element differences also in -3..3.

Table of values

n a(n)
1 1
2 3
3 17
4 81
5 397
6 2003
7 10239
8 52697
9 273021
10 1422337
11 7442827
12 39091861
13 205972443
14 1088212379
15 5762943375
16 30582601227
17 162591973175
18 865826349887
19 4617379607829
20 24656446918287
21 131820057982369
22 705507882790695

List of values

[1, 3, 17, 81, 397, 2003, 10239, 52697, 273021, 1422337, 7442827, 39091861, 205972443, 1088212379, 5762943375, 30582601227, 162591973175, 865826349887, 4617379607829, 24656446918287, 131820057982369, 705507882790695]

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

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