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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.

A201549 Number of arrays of n integers in -5..5 with sum zero.

Table of values

n a(n)
0 1
1 1
2 11
3 91
4 891
5 8801
6 88913
7 908755
8 9377467
9 97464799
10 1018872811
11 10701243741
12 112835748609
13 1193692544825
14 12663809507129
15 134678108144591
16 1435345208419771
17 15326122342137035
18 163920458145421109

List of values

[1, 1, 11, 91, 891, 8801, 88913, 908755, 9377467, 97464799, 1018872811, 10701243741, 112835748609, 1193692544825, 12663809507129, 134678108144591, 1435345208419771, 15326122342137035, 163920458145421109]

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

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