A183154 - cp's OEIS frontend

A183154 T(n,k) is the number of order-preserving partial isometries (of an n-chain) of fixed k (fix of alpha is the number of fixed points of alpha).

n	a(n)
0	1
1	1
2	1
3	3
4	2
5	1
6	9
7	3
8	3
9	1
10	23
11	4
12	6
13	4
14	1
15	53
16	5
17	10
18	10
19	5
20	1
21	115
22	6
23	15
24	20
25	15
26	6
27	1
28	241
29	7
30	21
31	35
32	35
33	21
34	7
35	1
36	495
37	8
38	28
39	56
40	70
41	56
42	28
43	8
44	1
45	1005
46	9
47	36
48	84
49	126
50	126
51	84
52	36
53	9
54	1
55	2027
56	10
57	45
58	120
59	210
60	252
61	210
62	120
63	45
64	10
65	1

[1, 1, 1, 3, 2, 1, 9, 3, 3, 1, 23, 4, 6, 4, 1, 53, 5, 10, 10, 5, 1, 115, 6, 15, 20, 15, 6, 1, 241, 7, 21, 35, 35, 21, 7, 1, 495, 8, 28, 56, 70, 56, 28, 8, 1, 1005, 9, 36, 84, 126, 126, 84, 36, 9, 1, 2027, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1]

cp's OEIS Frontend

A183154 T(n,k) is the number of order-preserving partial isometries (of an n-chain) of fixed k (fix of alpha is the number of fixed points of alpha).

Table of values

List of values