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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.

A212806 Number of n X n matrices in which each row is a permutation of [1..n] and which contain no column rises.

Table of values

n a(n)
1 1
2 3
3 163
4 271375
5 21855093751
6 128645361626874561
7 78785944892341703819175577
8 6795588328283070704898044776213094655
9 107414633522643325764587104395687638119674465944431
10 392471529081605251407320880492124164530148025908765037878553312273
11 407934916447631403509359040563002566177814886353044858592046202746464825839911293037

List of values

[1, 3, 163, 271375, 21855093751, 128645361626874561, 78785944892341703819175577, 6795588328283070704898044776213094655, 107414633522643325764587104395687638119674465944431, 392471529081605251407320880492124164530148025908765037878553312273, 407934916447631403509359040563002566177814886353044858592046202746464825839911293037]

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

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