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.

A188117 Number of strictly increasing arrangements of n nonzero numbers in -(n+2)..(n+2) with sum zero.

Table of values

n a(n)
1 0
2 4
3 8
4 31
5 90
6 308
7 1032
8 3528
9 12124
10 42262
11 148518
12 525869
13 1874648
14 6725266
15 24260940
16 87958188
17 320349712
18 1171609968
19 4301272078
20 15846418258
21 58569008756
22 217121189648
23 807123533172
24 3008133255026
25 11238226082080

List of values

[0, 4, 8, 31, 90, 308, 1032, 3528, 12124, 42262, 148518, 525869, 1874648, 6725266, 24260940, 87958188, 320349712, 1171609968, 4301272078, 15846418258, 58569008756, 217121189648, 807123533172, 3008133255026, 11238226082080]

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

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