A169765 - cp's OEIS frontend

A169765 Number of closed knight's tour diagrams of a 3 X n chessboard that are symmetric with respect to left-right reflection about a vertical axis.

n	a(n)
4	0
5	0
6	0
7	0
8	0
9	0
10	4
11	0
12	0
13	0
14	24
15	0
16	0
17	0
18	276
19	0
20	0
21	0
22	2604
23	0
24	0
25	0
26	25736
27	0
28	0
29	0
30	248816
31	0
32	0
33	0
34	2424608
35	0
36	0
37	0
38	23581056
39	0
40	0
41	0
42	229513584
43	0
44	0
45	0
46	2233386048
47	0
48	0
49	0
50	21733496960
51	0
52	0
53	0
54	211495383968
55	0
56	0
57	0
58	2058092298080

[0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 24, 0, 0, 0, 276, 0, 0, 0, 2604, 0, 0, 0, 25736, 0, 0, 0, 248816, 0, 0, 0, 2424608, 0, 0, 0, 23581056, 0, 0, 0, 229513584, 0, 0, 0, 2233386048, 0, 0, 0, 21733496960, 0, 0, 0, 211495383968, 0, 0, 0, 2058092298080]

cp's OEIS Frontend

A169765 Number of closed knight's tour diagrams of a 3 X n chessboard that are symmetric with respect to left-right reflection about a vertical axis.

Table of values

List of values