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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.

A318590 Number of connected balanced simple signed graphs on n unlabeled nodes.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 28
5 177
6 1982
7 33997
8 1020516
9 54570672
10 5347070228
11 967135763525
12 324200029119318
13 202046821340636691
14 234878262433630160622
15 511060736355598412146405
16 2088401066728281847415734793
17 16079824271822965645002329491423
18 233994776259866281916838227225733732

List of values

[1, 1, 2, 5, 28, 177, 1982, 33997, 1020516, 54570672, 5347070228, 967135763525, 324200029119318, 202046821340636691, 234878262433630160622, 511060736355598412146405, 2088401066728281847415734793, 16079824271822965645002329491423, 233994776259866281916838227225733732]

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

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