A255576 - cp's OEIS frontend

A255576 Integers k such that Sum_{i=1..t-1} d(i)/d(i+1) is prime, where d(1), ..., d(t) are the divisors of k in ascending order.

n	a(n)
1	16
2	64
3	729
4	1024
5	1536
6	6250
7	9375
8	16384
9	19683
10	39366
11	1179648
12	4194304
13	6770688
14	9765625
15	14348907
16	29229255
17	39062500
18	67108864
19	125000000
20	128472708
21	335544320
22	1337982976
23	10460353203

[16, 64, 729, 1024, 1536, 6250, 9375, 16384, 19683, 39366, 1179648, 4194304, 6770688, 9765625, 14348907, 29229255, 39062500, 67108864, 125000000, 128472708, 335544320, 1337982976, 10460353203]

cp's OEIS Frontend

A255576 Integers k such that Sum_{i=1..t-1} d(i)/d(i+1) is prime, where d(1), ..., d(t) are the divisors of k in ascending order.

Table of values

List of values