A334834 - cp's OEIS frontend

A334834 Composite numbers k such that the decimal expansion of ((1/2^(k-1))-1)/k is finite.

n	a(n)
1	4
2	8
3	10
4	15
5	16
6	20
7	25
8	28
9	32
10	40
11	50
12	64
13	70
14	75
15	80
16	100
17	112
18	125
19	128
20	160
21	175
22	200
23	250
24	256
25	280
26	320
27	325
28	341
29	375
30	400
31	425
32	448
33	496
34	500
35	512
36	561
37	625
38	640
39	645
40	700
41	730
42	800
43	1000
44	1016
45	1024
46	1105
47	1120
48	1250
49	1280
50	1288
51	1387
52	1600
53	1729
54	1750

[4, 8, 10, 15, 16, 20, 25, 28, 32, 40, 50, 64, 70, 75, 80, 100, 112, 125, 128, 160, 175, 200, 250, 256, 280, 320, 325, 341, 375, 400, 425, 448, 496, 500, 512, 561, 625, 640, 645, 700, 730, 800, 1000, 1016, 1024, 1105, 1120, 1250, 1280, 1288, 1387, 1600, 1729, 1750]

cp's OEIS Frontend

A334834 Composite numbers k such that the decimal expansion of ((1/2^(k-1))-1)/k is finite.

Table of values

List of values