A300003 - cp's OEIS frontend

A300003 Triangle read by rows: T(n, k) = number of permutations that are k "block reversals" away from 12...n, for n >= 0, and (for n>0) 0 <= k <= n-1.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	3
6	2
7	1
8	6
9	15
10	2
11	1
12	10
13	52
14	55
15	2
16	1
17	15
18	129
19	389
20	184
21	2
22	1
23	21
24	266
25	1563
26	2539
27	648
28	2
29	1
30	28
31	487
32	4642
33	16445
34	16604
35	2111
36	2
37	1
38	36
39	820
40	11407
41	69863
42	169034
43	105365
44	6352
45	2
46	1
47	45
48	1297
49	24600
50	228613
51	1016341
52	1686534
53	654030
54	17337
55	2

[1, 1, 1, 1, 1, 3, 2, 1, 6, 15, 2, 1, 10, 52, 55, 2, 1, 15, 129, 389, 184, 2, 1, 21, 266, 1563, 2539, 648, 2, 1, 28, 487, 4642, 16445, 16604, 2111, 2, 1, 36, 820, 11407, 69863, 169034, 105365, 6352, 2, 1, 45, 1297, 24600, 228613, 1016341, 1686534, 654030, 17337, 2]

cp's OEIS Frontend

A300003 Triangle read by rows: T(n, k) = number of permutations that are k "block reversals" away from 12...n, for n >= 0, and (for n>0) 0 <= k <= n-1.

Table of values

List of values