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.

A339301 Number of oriented series-parallel networks with n labeled elements and without multiple unit elements in parallel.

Table of values

n a(n)
1 1
2 2
3 12
4 108
5 1380
6 22440
7 446040
8 10461360
9 282970800
10 8670594240
11 296850597120
12 11230473925440
13 465262142304960
14 20948652798353280
15 1018583225567107200
16 53190962586022060800
17 2969038807022050963200
18 176410305542414738995200
19 11116489894884127122969600

List of values

[1, 2, 12, 108, 1380, 22440, 446040, 10461360, 282970800, 8670594240, 296850597120, 11230473925440, 465262142304960, 20948652798353280, 1018583225567107200, 53190962586022060800, 2969038807022050963200, 176410305542414738995200, 11116489894884127122969600]

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

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