A361269 - cp's OEIS frontend

A361269 Triangular array read by rows. T(n,k) is the number of binary relations on [n] containing exactly k strongly connected components, n >= 0, 0 <= k <= n.

n	a(n)
0	1
1	0
2	2
3	0
4	4
5	12
6	0
7	144
8	168
9	200
10	0
11	25696
12	18768
13	12384
14	8688
15	0
16	18082560
17	8697280
18	3923040
19	1914560
20	936992
21	0
22	47025585664
23	14670384000
24	4512045120
25	1622358720
26	647087040
27	242016192
28	0
29	450955726792704
30	87781550054912
31	17679638000640
32	4496696041600
33	1408276410240
34	482302375296
35	145763745920

[1, 0, 2, 0, 4, 12, 0, 144, 168, 200, 0, 25696, 18768, 12384, 8688, 0, 18082560, 8697280, 3923040, 1914560, 936992, 0, 47025585664, 14670384000, 4512045120, 1622358720, 647087040, 242016192, 0, 450955726792704, 87781550054912, 17679638000640, 4496696041600, 1408276410240, 482302375296, 145763745920]

cp's OEIS Frontend

A361269 Triangular array read by rows. T(n,k) is the number of binary relations on [n] containing exactly k strongly connected components, n >= 0, 0 <= k <= n.

Table of values

List of values