A236769 - cp's OEIS frontend

A236769 Numbers n such that lpf(2^n -1) < lpf(2^lpf(n) -1).

n	a(n)
1	55
2	77
3	161
4	169
5	221
6	275
7	299
8	323
9	377
10	385
11	391
12	437
13	481
14	493
15	539
16	551
17	559
18	605
19	611
20	629
21	689
22	697
23	703
24	715
25	731
26	779
27	793
28	799
29	817
30	847
31	893
32	901
33	923
34	935
35	949
36	1001
37	1007
38	1027
39	1045
40	1073
41	1079
42	1121
43	1127
44	1147
45	1159
46	1241
47	1265
48	1271
49	1273
50	1309

[55, 77, 161, 169, 221, 275, 299, 323, 377, 385, 391, 437, 481, 493, 539, 551, 559, 605, 611, 629, 689, 697, 703, 715, 731, 779, 793, 799, 817, 847, 893, 901, 923, 935, 949, 1001, 1007, 1027, 1045, 1073, 1079, 1121, 1127, 1147, 1159, 1241, 1265, 1271, 1273, 1309]

cp's OEIS Frontend

A236769 Numbers n such that lpf(2^n -1) < lpf(2^lpf(n) -1).

Table of values

List of values