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.

A189273 Number of n X n array permutations with each element not moved or moved diagonally or antidiagonally by one.

Table of values

n a(n)
1 1
2 4
3 45
4 2704
5 670480
6 787195249
7 4145792570105
8 101143260268999524
9 11280706205128114909440
10 5796399045731034830898691089
11 13683583940408484626053574835068160
12 148672374145154580465126584170730657054929
13 7431065990498975549840519048937892773708604741833

List of values

[1, 4, 45, 2704, 670480, 787195249, 4145792570105, 101143260268999524, 11280706205128114909440, 5796399045731034830898691089, 13683583940408484626053574835068160, 148672374145154580465126584170730657054929, 7431065990498975549840519048937892773708604741833]

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

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