A342862 - cp's OEIS frontend

A342862 Irregular table read by rows: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 2143. 0 <= k <= A028723(n + 1).

n	a(n)
0	1
1	1
2	2
3	6
4	23
5	1
6	103
7	11
8	4
9	2
10	513
11	88
12	53
13	33
14	18
15	8
16	6
17	0
18	0
19	1
20	2761
21	642
22	495
23	340
24	262
25	160
26	172
27	65
28	58
29	39
30	14
31	6
32	18
33	0
34	0
35	6
36	0
37	0
38	2
39	15767
40	4567
41	4099
42	3007
43	2692
44	1832
45	2171
46	1152
47	1291
48	968
49	728
50	457
51	566
52	174
53	176
54	221
55	129
56	14
57	122
58	29
59	38
60	52
61	8
62	0
63	32
64	9
65	0
66	10
67	0
68	0
69	8
70	0
71	0
72	0
73	0
74	0
75	1

[1, 1, 2, 6, 23, 1, 103, 11, 4, 2, 513, 88, 53, 33, 18, 8, 6, 0, 0, 1, 2761, 642, 495, 340, 262, 160, 172, 65, 58, 39, 14, 6, 18, 0, 0, 6, 0, 0, 2, 15767, 4567, 4099, 3007, 2692, 1832, 2171, 1152, 1291, 968, 728, 457, 566, 174, 176, 221, 129, 14, 122, 29, 38, 52, 8, 0, 32, 9, 0, 10, 0, 0, 8, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A342862 Irregular table read by rows: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 2143. 0 <= k <= A028723(n + 1).

Table of values

List of values