A227993 - cp's OEIS frontend

A227993 Let d(1) < d(2) < ... < d(q) denote the divisors of k. Sequence lists numbers k > 1 such that d(1)/d(2) + d(2)/d(3) + ... + d(q-1)/d(q) is an integer.

n	a(n)
1	4
2	16
3	27
4	54
5	64
6	256
7	729
8	1024
9	1296
10	1536
11	3125
12	4096
13	6250
14	9375
15	12500
16	16384
17	19683
18	30720
19	39366
20	65536
21	262144
22	472392
23	531441
24	823543
25	1048576
26	1179648
27	1647086
28	2125764
29	3294172
30	4194304
31	6291456
32	6770688
33	9765625
34	11595672
35	14348907
36	16777216

[4, 16, 27, 54, 64, 256, 729, 1024, 1296, 1536, 3125, 4096, 6250, 9375, 12500, 16384, 19683, 30720, 39366, 65536, 262144, 472392, 531441, 823543, 1048576, 1179648, 1647086, 2125764, 3294172, 4194304, 6291456, 6770688, 9765625, 11595672, 14348907, 16777216]

cp's OEIS Frontend

A227993 Let d(1) < d(2) < ... < d(q) denote the divisors of k. Sequence lists numbers k > 1 such that d(1)/d(2) + d(2)/d(3) + ... + d(q-1)/d(q) is an integer.

Table of values

List of values