A236406 - cp's OEIS frontend

A236406 Triangle read by rows: number of (1-2-3)-avoiding permutations on n letters with k peaks.

n	a(n)
0	1
1	1
2	2
3	3
4	2
5	4
6	10
7	5
8	32
9	5
10	6
11	84
12	42
13	7
14	198
15	210
16	14
17	8
18	438
19	816
20	168
21	9
22	932
23	2727
24	1152
25	42
26	10
27	1936
28	8250
29	5940
30	660
31	11
32	3962
33	23276
34	25630
35	5775
36	132
37	12
38	8034
39	62400
40	97812
41	37180
42	2574
43	13
44	16200
45	160953
46	341224
47	196625
48	27456
49	429
50	14
51	32556
52	402906
53	1111656
54	905086
55	212212
56	10010

[1, 1, 2, 3, 2, 4, 10, 5, 32, 5, 6, 84, 42, 7, 198, 210, 14, 8, 438, 816, 168, 9, 932, 2727, 1152, 42, 10, 1936, 8250, 5940, 660, 11, 3962, 23276, 25630, 5775, 132, 12, 8034, 62400, 97812, 37180, 2574, 13, 16200, 160953, 341224, 196625, 27456, 429, 14, 32556, 402906, 1111656, 905086, 212212, 10010]

cp's OEIS Frontend

A236406 Triangle read by rows: number of (1-2-3)-avoiding permutations on n letters with k peaks.

Table of values

List of values