A245767 - cp's OEIS frontend

A245767 Triangular array read by rows: T(n,k) is the number of transitive relations on {1,2,...,n} that have exactly k reflexive points, n>=0, 0<=k<=n.

n	a(n)
0	1
1	1
2	1
3	3
4	6
5	4
6	19
7	57
8	66
9	29
10	219
11	876
12	1428
13	1116
14	355
15	4231
16	21155
17	44500
18	49070
19	28405
20	6942
21	130023
22	780138
23	2013810
24	2858700
25	2354415
26	1068576
27	209527
28	6129859
29	42909013
30	131457522
31	228345565
32	242894155
33	158322528
34	58628647
35	9535241

[1, 1, 1, 3, 6, 4, 19, 57, 66, 29, 219, 876, 1428, 1116, 355, 4231, 21155, 44500, 49070, 28405, 6942, 130023, 780138, 2013810, 2858700, 2354415, 1068576, 209527, 6129859, 42909013, 131457522, 228345565, 242894155, 158322528, 58628647, 9535241]

cp's OEIS Frontend

A245767 Triangular array read by rows: T(n,k) is the number of transitive relations on {1,2,...,n} that have exactly k reflexive points, n>=0, 0<=k<=n.

Table of values

List of values