A344112 - cp's OEIS frontend

A344112 Triangle read by rows: T(n,k) is the number of relations from an n-element set to a k-element set that are not functions.

n	a(n)
1	1
2	3
3	12
4	7
5	56
6	485
7	15
8	240
9	4015
10	65280
11	31
12	992
13	32525
14	1047552
15	33551307
16	63
17	4032
18	261415
19	16773120
20	1073726199
21	68719430080
22	127
23	16256
24	2094965
25	268419072
26	34359660243
27	4398046231168
28	562949952597769
29	255
30	65280
31	16770655
32	4294901760
33	1099511237151

[1, 3, 12, 7, 56, 485, 15, 240, 4015, 65280, 31, 992, 32525, 1047552, 33551307, 63, 4032, 261415, 16773120, 1073726199, 68719430080, 127, 16256, 2094965, 268419072, 34359660243, 4398046231168, 562949952597769, 255, 65280, 16770655, 4294901760, 1099511237151]

cp's OEIS Frontend

A344112 Triangle read by rows: T(n,k) is the number of relations from an n-element set to a k-element set that are not functions.

Table of values

List of values