A135458 - cp's OEIS frontend

A135458 Number of transitive reflexive binary relations R on n labeled elements where max_{x}(|{y : xRy}|)=3.

n	a(n)
0	0
1	0
2	0
3	16
4	148
5	1805
6	23700
7	351239
8	5919312
9	112984855
10	2429692570
11	58481205365
12	1564981962720
13	46269631044377
14	1502736397861062
15	53336395962363115
16	2059205384354896000
17	86117408372404734527
18	3886421055028996900050
19	188615545123265662965785

[0, 0, 0, 16, 148, 1805, 23700, 351239, 5919312, 112984855, 2429692570, 58481205365, 1564981962720, 46269631044377, 1502736397861062, 53336395962363115, 2059205384354896000, 86117408372404734527, 3886421055028996900050, 188615545123265662965785]

cp's OEIS Frontend

A135458 Number of transitive reflexive binary relations R on n labeled elements where max_{x}(|{y : xRy}|)=3.

Table of values

List of values