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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.

A139673 Number of n X n symmetric binary matrices with all row sums 6.

Table of values

n a(n)
6 1
7 232
8 66178
9 24243520
10 11234051976
11 6549149852112
12 4762109992158288
13 4274712091685443584
14 4686484162304929219950
15 6209619146419137708859600
16 9845751579221258486943505348
17 18509102695712474753650903363840
18 40904306737052771732376660591663712

List of values

[1, 232, 66178, 24243520, 11234051976, 6549149852112, 4762109992158288, 4274712091685443584, 4686484162304929219950, 6209619146419137708859600, 9845751579221258486943505348, 18509102695712474753650903363840, 40904306737052771732376660591663712]

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

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