A387021 - cp's OEIS frontend

A387021 Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,0,7} for all i=1,...,n.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	5
12	7
13	10
14	13
15	17
16	21
17	25
18	30
19	36
20	46
21	59
22	81
23	109
24	153
25	207
26	277
27	361
28	463
29	589
30	743
31	949
32	1211
33	1589
34	2083
35	2773
36	3670
37	4861
38	6388
39	8344
40	10848
41	14019
42	18166
43	23479
44	30556
45	39762
46	52049
47	68125
48	89345
49	117034
50	153078
51	199979
52	260572
53	339546
54	441669
55	575341

[1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 5, 7, 10, 13, 17, 21, 25, 30, 36, 46, 59, 81, 109, 153, 207, 277, 361, 463, 589, 743, 949, 1211, 1589, 2083, 2773, 3670, 4861, 6388, 8344, 10848, 14019, 18166, 23479, 30556, 39762, 52049, 68125, 89345, 117034, 153078, 199979, 260572, 339546, 441669, 575341]

cp's OEIS Frontend

A387021 Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,0,7} for all i=1,...,n.

Table of values

List of values