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.

A218092 Number of transitive reflexive early confluent binary relations R on n labeled elements with max_{x}(|{y : xRy}|) = 2.

Table of values

n a(n)
2 3
3 12
4 61
5 310
6 1821
7 11592
8 80963
9 608832
10 4910785
11 42159238
12 383478987
13 3678859158
14 37087880753
15 391641822540
16 4319860660447
17 49647399946048
18 593217470459313
19 7354718987639958
20 94445777492433515
21 1254196823154143190
22 17198114810490326713

List of values

[3, 12, 61, 310, 1821, 11592, 80963, 608832, 4910785, 42159238, 383478987, 3678859158, 37087880753, 391641822540, 4319860660447, 49647399946048, 593217470459313, 7354718987639958, 94445777492433515, 1254196823154143190, 17198114810490326713]

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

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