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.

A193699 Number of arrays of -5..5 integers x(1..n) with every x(i) in a subsequence of length 1, 2 or 3 with sum zero.

Table of values

n a(n)
1 1
2 11
3 101
4 491
5 3141
6 19301
7 115761
8 706591
9 4292223
10 26065517
11 158426129
12 962553071
13 5848496923
14 35536745667
15 215924096065
16 1311980244395
17 7971749802937
18 48437255764809
19 294310402140129
20 1788264132674883

List of values

[1, 11, 101, 491, 3141, 19301, 115761, 706591, 4292223, 26065517, 158426129, 962553071, 5848496923, 35536745667, 215924096065, 1311980244395, 7971749802937, 48437255764809, 294310402140129, 1788264132674883]

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

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