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.

A058527 Number of 2n X 2n 0-1 matrices with n ones in each row and each column.

Table of values

n a(n)
0 1
1 2
2 90
3 297200
4 116963796250
5 6736218287430460752
6 64051375889927380035549804336
7 108738182111446498614705217754614976371200
8 34812290428176298285394893936773707951192224124239796250
9 2188263032066768922535710968724036448759525154977348944382853301460850000

List of values

[1, 2, 90, 297200, 116963796250, 6736218287430460752, 64051375889927380035549804336, 108738182111446498614705217754614976371200, 34812290428176298285394893936773707951192224124239796250, 2188263032066768922535710968724036448759525154977348944382853301460850000]

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

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