A107861 - cp's OEIS frontend

A107861 Number of distinct values taken by the sums of all subsets of the n-th roots of unity.

n	a(n)
1	2
2	3
3	7
4	9
5	31
6	19
7	127
8	81
9	343
10	211
11	2047
12	361
13	8191
14	2059
15	14221
16	6561
17	131071
18	6859
19	524287
20	44521
21	778765
22	175099
23	8388607
24	130321
25	28629151
26	1586131
27	40353607
28	4239481
29	536870911
30	1360291
31	2147483647
32	43046721

[2, 3, 7, 9, 31, 19, 127, 81, 343, 211, 2047, 361, 8191, 2059, 14221, 6561, 131071, 6859, 524287, 44521, 778765, 175099, 8388607, 130321, 28629151, 1586131, 40353607, 4239481, 536870911, 1360291, 2147483647, 43046721]

cp's OEIS Frontend

A107861 Number of distinct values taken by the sums of all subsets of the n-th roots of unity.

Table of values

List of values