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.

A204252 Permanent of the n-th principal submatrix of A201208 (in square format).

Table of values

n a(n)
1 1
2 5
3 18
4 132
5 876
6 8820
7 85392
8 1106496
9 14057280
10 223560000
11 3513456000
12 66305952000
13 1241430624000
14 27127003680000
15 589395356928000
16 14638710417408000
17 362021985626112000
18 10073602372700160000
19 279369787588448256000
20 8609476463579013120000
21 264609942011693752320000

List of values

[1, 5, 18, 132, 876, 8820, 85392, 1106496, 14057280, 223560000, 3513456000, 66305952000, 1241430624000, 27127003680000, 589395356928000, 14638710417408000, 362021985626112000, 10073602372700160000, 279369787588448256000, 8609476463579013120000, 264609942011693752320000]

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

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