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.

A339283 Number of unoriented series-parallel networks with n integer valued elements spanning an initial interval of positive integers.

Table of values

n a(n)
1 1
2 4
3 28
4 361
5 7061
6 184327
7 5941855
8 226973560
9 10011116097
10 500553647373
11 27975194135702
12 1728193768303770
13 116934429186262096
14 8600448307248025405
15 683181845460624644202
16 58290243136791332908001
17 5316517137637684870655592
18 516199318599186277653647746

List of values

[1, 4, 28, 361, 7061, 184327, 5941855, 226973560, 10011116097, 500553647373, 27975194135702, 1728193768303770, 116934429186262096, 8600448307248025405, 683181845460624644202, 58290243136791332908001, 5316517137637684870655592, 516199318599186277653647746]

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

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