A242521 - cp's OEIS frontend

A242521 Number of cyclic arrangements (up to direction) of {1,2,...,n} such that the difference between any two neighbors is b^k for some b>1 and k>1.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	2
14	4
15	6
16	9
17	42
18	231
19	1052
20	3818
21	10086
22	27892
23	90076
24	310301
25	993680
26	4663558
27	22038882
28	162588454
29	1246422151
30	8655752023
31	58951670318
32	347675502245

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 6, 9, 42, 231, 1052, 3818, 10086, 27892, 90076, 310301, 993680, 4663558, 22038882, 162588454, 1246422151, 8655752023, 58951670318, 347675502245]

cp's OEIS Frontend

A242521 Number of cyclic arrangements (up to direction) of {1,2,...,n} such that the difference between any two neighbors is b^k for some b>1 and k>1.

Table of values

List of values