A377715 - cp's OEIS frontend

A377715 Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,3,4} for all i=1,...,n.

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	1
6	1
7	0
8	0
9	0
10	1
11	3
12	1
13	0
14	0
15	1
16	6
17	6
18	1
19	1
20	1
21	10
22	20
23	10
24	5
25	6
26	15
27	50
28	50
29	25
30	30
31	36
32	105
33	175
34	125
35	115
36	141
37	231
38	490
39	525
40	435
41	541
42	673
43	1246
44	1820
45	1695
46	1901
47	2361
48	3361
49	5501
50	6301
51	6601
52	8295
53	10440
54	15820
55	21410
56	23286

[1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 3, 1, 0, 0, 1, 6, 6, 1, 1, 1, 10, 20, 10, 5, 6, 15, 50, 50, 25, 30, 36, 105, 175, 125, 115, 141, 231, 490, 525, 435, 541, 673, 1246, 1820, 1695, 1901, 2361, 3361, 5501, 6301, 6601, 8295, 10440, 15820, 21410, 23286]

cp's OEIS Frontend

A377715 Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,3,4} for all i=1,...,n.

Table of values

List of values