A280963 - cp's OEIS frontend

A280963 Numbers n such that for all divisors of n, ratios of 2 consecutive divisors of n will always reduce to lowest terms to a fraction with numerator=denominator+2.

n	a(n)
1	1
2	3
3	9
4	15
5	27
6	75
7	81
8	99
9	243
10	255
11	315
12	375
13	729
14	783
15	1089
16	1875
17	2187
18	4335
19	6561
20	6723
21	9375
22	9999
23	11979
24	19683
25	22707
26	46875
27	59049
28	65535
29	73695
30	99855
31	131769
32	177147
33	234375
34	531441
35	558009
36	658503
37	1009899
38	1171875
39	1188099
40	1252815
41	1449459
42	1594323

[1, 3, 9, 15, 27, 75, 81, 99, 243, 255, 315, 375, 729, 783, 1089, 1875, 2187, 4335, 6561, 6723, 9375, 9999, 11979, 19683, 22707, 46875, 59049, 65535, 73695, 99855, 131769, 177147, 234375, 531441, 558009, 658503, 1009899, 1171875, 1188099, 1252815, 1449459, 1594323]

cp's OEIS Frontend

A280963 Numbers n such that for all divisors of n, ratios of 2 consecutive divisors of n will always reduce to lowest terms to a fraction with numerator=denominator+2.

Table of values

List of values