A115755 - cp's OEIS frontend

A115755 Number of permutations of n elements whose unsigned reversal distance is k.

n	a(n)
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	51
14	56
15	2
16	1
17	15
18	127
19	390
20	185
21	2
22	1
23	21
24	263
25	1562
26	2543
27	648
28	2
29	1
30	28
31	483
32	4635
33	16445
34	16615
35	2111
36	2
37	1
38	36
39	820
40	11407
41	69863
42	169034
43	105365
44	6352
45	2

[1, 1, 1, 1, 3, 2, 1, 6, 15, 2, 1, 10, 51, 56, 2, 1, 15, 127, 390, 185, 2, 1, 21, 263, 1562, 2543, 648, 2, 1, 28, 483, 4635, 16445, 16615, 2111, 2, 1, 36, 820, 11407, 69863, 169034, 105365, 6352, 2]

cp's OEIS Frontend

A115755 Number of permutations of n elements whose unsigned reversal distance is k.

Table of values

List of values