A349006 - cp's OEIS frontend

A349006 a(1) = 1; for n > 1, a(n) is the smallest number m such that sigma(m) = tau(m)^n or 0 if no such m exists.

n	a(n)
1	1
2	3
3	7
4	217
5	31
6	3937
7	127
8	57337
9	253921
10	917497
11	3670009
12	16252897
13	8191
14	61079603913818329
15	1073602561
16	4294434817
17	131071
18	66571993057
19	524287
20	1208766717309082486038529
21	9222228542614937599
22	17590038552577
23	500367932999371587367
24	281472829095937
25	1125897758834689

[1, 3, 7, 217, 31, 3937, 127, 57337, 253921, 917497, 3670009, 16252897, 8191, 61079603913818329, 1073602561, 4294434817, 131071, 66571993057, 524287, 1208766717309082486038529, 9222228542614937599, 17590038552577, 500367932999371587367, 281472829095937, 1125897758834689]

cp's OEIS Frontend

A349006 a(1) = 1; for n > 1, a(n) is the smallest number m such that sigma(m) = tau(m)^n or 0 if no such m exists.

Table of values

List of values