A306545 - cp's OEIS frontend

A306545 Number of permutations p of [2n+2] such that min_{j=1..2n+2} |p(j)-j| = n.

n	a(n)
0	1
1	8
2	28
3	111
4	435
5	1707
6	6723
7	26571
8	105315
9	418347
10	1664643
11	6632331
12	26450595
13	105566187
14	421556163
15	1684098891
16	6730018275
17	26900941227
18	107546369283
19	430013290251
20	1719536600355
21	6876596719467
22	27501737832003
23	109993004190411
24	439930175348835

[1, 8, 28, 111, 435, 1707, 6723, 26571, 105315, 418347, 1664643, 6632331, 26450595, 105566187, 421556163, 1684098891, 6730018275, 26900941227, 107546369283, 430013290251, 1719536600355, 6876596719467, 27501737832003, 109993004190411, 439930175348835]

cp's OEIS Frontend

A306545 Number of permutations p of [2n+2] such that min_{j=1..2n+2} |p(j)-j| = n.

Table of values

List of values