A387020 - cp's OEIS frontend

A387020 Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,0,5} for all i=1,...,n.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	3
9	5
10	7
11	10
12	13
13	16
14	20
15	25
16	34
17	46
18	67
19	94
20	130
21	175
22	231
23	305
24	400
25	540
26	729
27	999
28	1363
29	1855
30	2510
31	3370
32	4531
33	6070
34	8180
35	11026
36	14921
37	20197
38	27322
39	36940
40	49820
41	67204
42	90528
43	122091
44	164686
45	222344
46	300316
47	405574
48	547768
49	739291
50	997794
51	1346130

[1, 1, 1, 1, 1, 1, 1, 2, 3, 5, 7, 10, 13, 16, 20, 25, 34, 46, 67, 94, 130, 175, 231, 305, 400, 540, 729, 999, 1363, 1855, 2510, 3370, 4531, 6070, 8180, 11026, 14921, 20197, 27322, 36940, 49820, 67204, 90528, 122091, 164686, 222344, 300316, 405574, 547768, 739291, 997794, 1346130]

cp's OEIS Frontend

A387020 Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,0,5} for all i=1,...,n.

Table of values

List of values