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.

A001507 a(n) is the number of c-nets with n+1 vertices and 2n+1 edges, n >= 1.

Table of values

n a(n)
1 0
2 0
3 0
4 3
5 33
6 338
7 3580
8 39525
9 452865
10 5354832
11 65022840
12 807560625
13 10224817515
14 131631305718
15 1719292293940
16 22743461653913
17 304256251541865
18 4111134671255120
19 56049154766899216
20 770325744569310630
21 10664613057653024586
22 148625522045319923940

List of values

[0, 0, 0, 3, 33, 338, 3580, 39525, 452865, 5354832, 65022840, 807560625, 10224817515, 131631305718, 1719292293940, 22743461653913, 304256251541865, 4111134671255120, 56049154766899216, 770325744569310630, 10664613057653024586, 148625522045319923940]

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

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