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.

A188115 Number of strictly increasing arrangements of n nonzero numbers in -n..n with sum zero.

Table of values

n a(n)
1 0
2 2
3 2
4 8
5 16
6 52
7 152
8 484
9 1536
10 5064
11 16946
12 57528
13 197616
14 686588
15 2407538
16 8510428
17 30300268
18 108575996
19 391301260
20 1417520988
21 5159160792
22 18857230104
23 69193592020
24 254802169904
25 941383915572
26 3488574124056
27 12964318919492

List of values

[0, 2, 2, 8, 16, 52, 152, 484, 1536, 5064, 16946, 57528, 197616, 686588, 2407538, 8510428, 30300268, 108575996, 391301260, 1417520988, 5159160792, 18857230104, 69193592020, 254802169904, 941383915572, 3488574124056, 12964318919492]

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

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