A336700 - cp's OEIS frontend

A336700 Numbers k such that the odd part of (1+k) divides (1 + odd part of sigma(k)).

n	a(n)
1	1
2	3
3	7
4	15
5	31
6	63
7	127
8	255
9	511
10	1023
11	2047
12	2431
13	2943
14	3775
15	4095
16	8191
17	13311
18	14335
19	16383
20	17407
21	21951
22	22527
23	32767
24	34335
25	44031
26	57855
27	65535
28	85375
29	131071
30	204799
31	262143
32	376831
33	524287
34	923647
35	1048575
36	1562623
37	1632255
38	2056191
39	2097151
40	2744319
41	4194303
42	6815743
43	8388607
44	8781823
45	10059775
46	16777215

[1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 2431, 2943, 3775, 4095, 8191, 13311, 14335, 16383, 17407, 21951, 22527, 32767, 34335, 44031, 57855, 65535, 85375, 131071, 204799, 262143, 376831, 524287, 923647, 1048575, 1562623, 1632255, 2056191, 2097151, 2744319, 4194303, 6815743, 8388607, 8781823, 10059775, 16777215]

cp's OEIS Frontend

A336700 Numbers k such that the odd part of (1+k) divides (1 + odd part of sigma(k)).

Table of values

List of values