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.

A247597 Number of nonisomorphic binary n X n matrices with four 1's per column under row and column permutations.

Table of values

n a(n)
4 1
5 7
6 132
7 6178
8 594203
9 85820809
10 16341829155
11 3875736708590
12 1112175913348040
13 378860991866916370
14 151006214911844288232
15 69600017255860985666964
16 36729204987785981237238642
17 22003003913198378660826731007
18 14851323097928973689736994569534

List of values

[1, 7, 132, 6178, 594203, 85820809, 16341829155, 3875736708590, 1112175913348040, 378860991866916370, 151006214911844288232, 69600017255860985666964, 36729204987785981237238642, 22003003913198378660826731007, 14851323097928973689736994569534]

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

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