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.

A139679 Number of n X n symmetric binary matrices with no row sum greater than 3.

Table of values

n a(n)
0 1
1 2
2 8
3 64
4 809
5 13846
6 301262
7 8035168
8 255780779
9 9519891214
10 407613033836
11 19816627136912
12 1082142442901863
13 65776576008442274
14 4416031241930248774
15 325289604104049686096
16 26137255635911145802777
17 2279186202842678350137218
18 214713550195887533572753024

List of values

[1, 2, 8, 64, 809, 13846, 301262, 8035168, 255780779, 9519891214, 407613033836, 19816627136912, 1082142442901863, 65776576008442274, 4416031241930248774, 325289604104049686096, 26137255635911145802777, 2279186202842678350137218, 214713550195887533572753024]

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

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