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.

A321446 Number of (0,1)-matrices with n ones, no zero rows or columns, and distinct rows and columns.

Table of values

n a(n)
0 1
1 1
2 2
3 10
4 72
5 624
6 6522
7 80178
8 1129368
9 17917032
10 316108752
11 6138887616
12 130120838400
13 2989026225696
14 73964789192400
15 1961487062520720
16 55495429438186920
17 1668498596700706440
18 53122020640948010640
19 1785467619718933936560
20 63175132023953553400440

List of values

[1, 1, 2, 10, 72, 624, 6522, 80178, 1129368, 17917032, 316108752, 6138887616, 130120838400, 2989026225696, 73964789192400, 1961487062520720, 55495429438186920, 1668498596700706440, 53122020640948010640, 1785467619718933936560, 63175132023953553400440]

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

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