A229158 - cp's OEIS frontend

A229158 Triangle T(n,k) read by rows: T(n,k) = number of permutations on 123...n with exactly two abc patterns and no aj pattern with j<=k, for n>=0, 0<=k<=n.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	3
11	3
12	1
13	0
14	0
15	24
16	24
17	12
18	2
19	0
20	0
21	133
22	133
23	74
24	23
25	3
26	0
27	0
28	635
29	635
30	371
31	141
32	36
33	4
34	0
35	0
36	2807
37	2807
38	1688
39	709
40	227
41	51
42	5
43	0
44	0
45	11864
46	11864
47	7276
48	3248
49	1168
50	334
51	68
52	6
53	0
54	0
55	48756
56	48756
57	30340
58	14121
59	5459
60	1771
61	464
62	87
63	7
64	0
65	0

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 1, 0, 0, 24, 24, 12, 2, 0, 0, 133, 133, 74, 23, 3, 0, 0, 635, 635, 371, 141, 36, 4, 0, 0, 2807, 2807, 1688, 709, 227, 51, 5, 0, 0, 11864, 11864, 7276, 3248, 1168, 334, 68, 6, 0, 0, 48756, 48756, 30340, 14121, 5459, 1771, 464, 87, 7, 0, 0]

cp's OEIS Frontend

A229158 Triangle T(n,k) read by rows: T(n,k) = number of permutations on 123...n with exactly two abc patterns and no aj pattern with j<=k, for n>=0, 0<=k<=n.

Table of values

List of values