A384105 - cp's OEIS frontend

A384105 Triangle read by rows: T(n,k) is the number of binary relations on a set of n objects, exactly k of which are self referencing, 0 <= k <= n.

n	a(n)
0	1
1	1
2	1
3	3
4	4
5	3
6	16
7	36
8	36
9	16
10	218
11	752
12	1104
13	752
14	218
15	9608
16	45960
17	90416
18	90416
19	45960
20	9608
21	1540944
22	9133760
23	22692704
24	30194176
25	22692704
26	9133760
27	1540944
28	882033440
29	6154473664
30	18425858880
31	30679088480
32	30679088480
33	18425858880
34	6154473664
35	882033440

[1, 1, 1, 3, 4, 3, 16, 36, 36, 16, 218, 752, 1104, 752, 218, 9608, 45960, 90416, 90416, 45960, 9608, 1540944, 9133760, 22692704, 30194176, 22692704, 9133760, 1540944, 882033440, 6154473664, 18425858880, 30679088480, 30679088480, 18425858880, 6154473664, 882033440]

cp's OEIS Frontend

A384105 Triangle read by rows: T(n,k) is the number of binary relations on a set of n objects, exactly k of which are self referencing, 0 <= k <= n.

Table of values

List of values