A245578 - cp's OEIS frontend

A245578 The number of permutations of {0,0,1,1,...,n-1,n-1} that begin with 0 and in which adjacent elements are adjacent mod n.

n	a(n)
2	1
3	10
4	18
5	22
6	32
7	38
8	50
9	58
10	72
11	82
12	98
13	110
14	128
15	142
16	162
17	178
18	200
19	218
20	242
21	262
22	288
23	310
24	338
25	362
26	392
27	418
28	450
29	478
30	512
31	542
32	578
33	610
34	648
35	682
36	722
37	758
38	800
39	838
40	882
41	922
42	968
43	1010
44	1058
45	1102
46	1152
47	1198
48	1250
49	1298
50	1352
51	1402
52	1458
53	1510
54	1568
55	1622
56	1682
57	1738
58	1800
59	1858
60	1922
61	1982
62	2048
63	2110

[1, 10, 18, 22, 32, 38, 50, 58, 72, 82, 98, 110, 128, 142, 162, 178, 200, 218, 242, 262, 288, 310, 338, 362, 392, 418, 450, 478, 512, 542, 578, 610, 648, 682, 722, 758, 800, 838, 882, 922, 968, 1010, 1058, 1102, 1152, 1198, 1250, 1298, 1352, 1402, 1458, 1510, 1568, 1622, 1682, 1738, 1800, 1858, 1922, 1982, 2048, 2110]

cp's OEIS Frontend

A245578 The number of permutations of {0,0,1,1,...,n-1,n-1} that begin with 0 and in which adjacent elements are adjacent mod n.

Table of values

List of values