A080004 - cp's OEIS frontend

A080004 Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={-1,2}.

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	9
6	15
7	25
8	46
9	84
10	156
11	280
12	501
13	909
14	1647
15	2990
16	5408
17	9773
18	17695
19	32033
20	58000
21	104976
22	189968
23	343860
24	622409
25	1126617
26	2039201
27	3690898
28	6680644
29	12092173
30	21887215
31	39616409
32	71706406
33	129790404
34	234923948

[1, 1, 1, 2, 4, 9, 15, 25, 46, 84, 156, 280, 501, 909, 1647, 2990, 5408, 9773, 17695, 32033, 58000, 104976, 189968, 343860, 622409, 1126617, 2039201, 3690898, 6680644, 12092173, 21887215, 39616409, 71706406, 129790404, 234923948]

cp's OEIS Frontend

A080004 Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={-1,2}.

Table of values

List of values