A218581 - cp's OEIS frontend

A218581 Triangle read by rows: T(n,k) is the number of ascent sequences of length n with last occurrence of the maximal value at position k-1.

n	a(n)
1	1
2	0
3	2
4	0
5	1
6	4
7	0
8	1
9	4
10	10
11	0
12	1
13	6
14	15
15	31
16	0
17	1
18	10
19	29
20	62
21	115
22	0
23	1
24	18
25	63
26	148
27	288
28	496
29	0
30	1
31	34
32	149
33	392
34	826
35	1496
36	2437
37	0
38	1
39	66
40	375
41	1120
42	2592
43	5036
44	8615
45	13435
46	0
47	1
48	130
49	989
50	3392
51	8698
52	18332
53	33391
54	54548
55	82127

[1, 0, 2, 0, 1, 4, 0, 1, 4, 10, 0, 1, 6, 15, 31, 0, 1, 10, 29, 62, 115, 0, 1, 18, 63, 148, 288, 496, 0, 1, 34, 149, 392, 826, 1496, 2437, 0, 1, 66, 375, 1120, 2592, 5036, 8615, 13435, 0, 1, 130, 989, 3392, 8698, 18332, 33391, 54548, 82127]

cp's OEIS Frontend

A218581 Triangle read by rows: T(n,k) is the number of ascent sequences of length n with last occurrence of the maximal value at position k-1.

Table of values

List of values