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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.

A090601 Number of n-element groupoids with an identity.

Table of values

n a(n)
1 1
2 2
3 45
4 43968
5 6358196250
6 236919104155855296
7 3682959509036574988532481464
8 35398008251644050232134479709365068115968
9 292415292106611727928759157427747328169866020125762652311

List of values

[1, 2, 45, 43968, 6358196250, 236919104155855296, 3682959509036574988532481464, 35398008251644050232134479709365068115968, 292415292106611727928759157427747328169866020125762652311]

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

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