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.

A217701 Permanent of the n X n matrix with all diagonal entries n and all off diagonal entries 1.

Table of values

n a(n)
0 1
1 1
2 5
3 38
4 393
5 5144
6 81445
7 1512720
8 32237681
9 775193984
10 20759213061
11 612623724800
12 19751688891385
13 690721009155072
14 26039042401938917
15 1052645311044368384
16 45424010394042998625
17 2083972769418997760000
18 101288683106200561501189
19 5199006109868903819575296

List of values

[1, 1, 5, 38, 393, 5144, 81445, 1512720, 32237681, 775193984, 20759213061, 612623724800, 19751688891385, 690721009155072, 26039042401938917, 1052645311044368384, 45424010394042998625, 2083972769418997760000, 101288683106200561501189, 5199006109868903819575296]

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

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