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.

A258720 Number of non-self-dual groupoids which are equal to their duals.

Table of values

n a(n)
1 0
2 3
3 1596
4 89460896
5 1241763541901150
6 7162795001623210170643008
7 25488450150907291894372809845206177481
8 77841043345568973636021232493841647618443964915982324
9 270925719901279918478856582434909122129159229348142178651137261056627814

List of values

[0, 3, 1596, 89460896, 1241763541901150, 7162795001623210170643008, 25488450150907291894372809845206177481, 77841043345568973636021232493841647618443964915982324, 270925719901279918478856582434909122129159229348142178651137261056627814]

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

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