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.

A206712 Total number of distinct Hadamard matrices of order n.

Table of values

n a(n)
1 2
2 8
3 0
4 768
5 0
6 0
7 0
8 4954521600
9 0
10 0
11 0
12 20251509535014912000
13 0
14 0
15 0
16 88526812916367202104587059200000
17 0
18 0
19 0
20 3776127947893930552689423154306445475840000000
21 0
22 0
23 0
24 92624181047745713568610317051197596401168530978226831360000000
25 0
26 0
27 0
28 886156947284057553944669848348035536068124589065755283423684984832000000000000
29 0
30 0
31 0

List of values

[2, 8, 0, 768, 0, 0, 0, 4954521600, 0, 0, 0, 20251509535014912000, 0, 0, 0, 88526812916367202104587059200000, 0, 0, 0, 3776127947893930552689423154306445475840000000, 0, 0, 0, 92624181047745713568610317051197596401168530978226831360000000, 0, 0, 0, 886156947284057553944669848348035536068124589065755283423684984832000000000000, 0, 0, 0]

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

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