A344115 - cp's OEIS frontend

A344115 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 one-to-one functions.

n	a(n)
1	1
2	2
3	14
4	5
5	58
6	506
7	12
8	244
9	4072
10	65512
11	27
12	1004
13	32708
14	1048456
15	33554312
16	58
17	4066
18	262024
19	16776856
20	1073741104
21	68719476016
22	121
23	16342
24	2096942
25	268434616
26	34359735848
27	4398046506064
28	562949953416272
29	248
30	65480
31	16776880
32	4294965616
33	1099511621056

[1, 2, 14, 5, 58, 506, 12, 244, 4072, 65512, 27, 1004, 32708, 1048456, 33554312, 58, 4066, 262024, 16776856, 1073741104, 68719476016, 121, 16342, 2096942, 268434616, 34359735848, 4398046506064, 562949953416272, 248, 65480, 16776880, 4294965616, 1099511621056]

cp's OEIS Frontend

A344115 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 one-to-one functions.

Table of values

List of values