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.

A210918 Number of transitive reflexive early confluent binary relations R on n labeled elements where |{y : xRy}| <= 10 for all x.

Table of values

n a(n)
0 1
1 1
2 4
3 26
4 243
5 2992
6 45906
7 845287
8 18182926
9 447797646
10 12429760889
11 382432412429
12 12895551865341
13 472172004983602
14 18636388954609376
15 788226102638064075
16 35549770035085876130
17 1702625512220935301410
18 86287522467158470208030
19 4612838996164892567266399

List of values

[1, 1, 4, 26, 243, 2992, 45906, 845287, 18182926, 447797646, 12429760889, 382432412429, 12895551865341, 472172004983602, 18636388954609376, 788226102638064075, 35549770035085876130, 1702625512220935301410, 86287522467158470208030, 4612838996164892567266399]

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

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