A355783 - cp's OEIS frontend

A355783 Triangular array read by rows. T(n,k) is the number of labeled transitive relations on [n] that have exactly k symmetric points.

n	a(n)
0	1
1	2
2	0
3	12
4	0
5	1
6	152
7	0
8	18
9	1
10	3504
11	0
12	456
13	24
14	10
15	135392
16	0
17	17520
18	760
19	600
20	31
21	8321472
22	0
23	1015440
24	35040
25	40560
26	2316
27	361
28	784621952
29	0
30	87375456
31	2369360
32	3615360
33	185556
34	52682
35	2164
36	110521185024
37	0
38	10984707328
39	233001216
40	441616000
41	19052992
42	7723408
43	384992
44	32663

[1, 2, 0, 12, 0, 1, 152, 0, 18, 1, 3504, 0, 456, 24, 10, 135392, 0, 17520, 760, 600, 31, 8321472, 0, 1015440, 35040, 40560, 2316, 361, 784621952, 0, 87375456, 2369360, 3615360, 185556, 52682, 2164, 110521185024, 0, 10984707328, 233001216, 441616000, 19052992, 7723408, 384992, 32663]

cp's OEIS Frontend

A355783 Triangular array read by rows. T(n,k) is the number of labeled transitive relations on [n] that have exactly k symmetric points.

Table of values

List of values