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.

A339300 Number of essentially parallel oriented series-parallel networks with n labeled elements and without multiple unit elements in parallel.

Table of values

n a(n)
1 1
2 0
3 6
4 36
5 540
6 8400
7 169680
8 3966480
9 107518320
10 3295283040
11 112888369440
12 4272403544640
13 177061349424960
14 7974538914101760
15 387840385867334400
16 20257533315635616000
17 1130954856127948051200
18 67208532822729871372800
19 4235759061057115720128000

List of values

[1, 0, 6, 36, 540, 8400, 169680, 3966480, 107518320, 3295283040, 112888369440, 4272403544640, 177061349424960, 7974538914101760, 387840385867334400, 20257533315635616000, 1130954856127948051200, 67208532822729871372800, 4235759061057115720128000]

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

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