A262494 - cp's OEIS frontend

A262494 Triangle read by rows: T(n,k) (n>=1, 0<=k is the number of permutations of n things that require k stack-sorts.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	13
9	8
10	2
11	1
12	41
13	49
14	23
15	6
16	1
17	131
18	276
19	198
20	90
21	24
22	1
23	428
24	1509
25	1556
26	982
27	444
28	120
29	1
30	1429
31	8184
32	11812
33	9678
34	5856
35	2640
36	720
37	1
38	4861
39	44473
40	88566
41	91959
42	68820
43	40800
44	18360
45	5040
46	1
47	16795
48	243334
49	662732
50	863296
51	775134
52	555828
53	325200
54	146160
55	40320

[1, 1, 1, 1, 4, 1, 1, 13, 8, 2, 1, 41, 49, 23, 6, 1, 131, 276, 198, 90, 24, 1, 428, 1509, 1556, 982, 444, 120, 1, 1429, 8184, 11812, 9678, 5856, 2640, 720, 1, 4861, 44473, 88566, 91959, 68820, 40800, 18360, 5040, 1, 16795, 243334, 662732, 863296, 775134, 555828, 325200, 146160, 40320]

cp's OEIS Frontend

A262494 Triangle read by rows: T(n,k) (n>=1, 0<=k is the number of permutations of n things that require k stack-sorts.

Table of values

List of values