A321629 - cp's OEIS frontend

A321629 The Riordan square of the permutation involutions. Triangle T(n, k), 0 <= k <= n, read by rows.

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	1
6	4
7	8
8	5
9	1
10	10
11	22
12	18
13	7
14	1
15	26
16	62
17	60
18	32
19	9
20	1
21	76
22	184
23	194
24	126
25	50
26	11
27	1
28	232
29	568
30	630
31	462
32	228
33	72
34	13
35	1
36	764
37	1840
38	2072
39	1644
40	938
41	374
42	98
43	15
44	1
45	2620
46	6204
47	6972
48	5788
49	3650
50	1710
51	572
52	128
53	17
54	1

[1, 1, 1, 2, 3, 1, 4, 8, 5, 1, 10, 22, 18, 7, 1, 26, 62, 60, 32, 9, 1, 76, 184, 194, 126, 50, 11, 1, 232, 568, 630, 462, 228, 72, 13, 1, 764, 1840, 2072, 1644, 938, 374, 98, 15, 1, 2620, 6204, 6972, 5788, 3650, 1710, 572, 128, 17, 1]

cp's OEIS Frontend

A321629 The Riordan square of the permutation involutions. Triangle T(n, k), 0 <= k <= n, read by rows.

Table of values

List of values