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.

A333899 Number of nonequivalent n X n binary matrices with 3 ones in every row and column up to permutation of rows.

Table of values

n a(n)
0 1
1 0
2 0
3 1
4 1
5 22
6 550
7 16700
8 703297
9 38135272
10 2584332084
11 214050246975
12 21269928579625
13 2497135296996934
14 341930210261762434
15 54008226638062039798
16 9746833030828647070625
17 1993080976749664740373600
18 458405276998431265342151848
19 117814680468332544208002721773

List of values

[1, 0, 0, 1, 1, 22, 550, 16700, 703297, 38135272, 2584332084, 214050246975, 21269928579625, 2497135296996934, 341930210261762434, 54008226638062039798, 9746833030828647070625, 1993080976749664740373600, 458405276998431265342151848, 117814680468332544208002721773]

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

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