A387418 - cp's OEIS frontend

A387418 Numbers k such that the odd part of (1+k) divides (1 + odd part of A034448(k)), where A034448 is unitary sigma (usigma).

n	a(n)
1	1
2	3
3	7
4	15
5	31
6	63
7	127
8	255
9	511
10	1023
11	1791
12	2047
13	2431
14	4095
15	8191
16	14335
17	14847
18	16383
19	27391
20	32767
21	44031
22	57855
23	65535
24	114687
25	131071
26	204799
27	262143
28	376831
29	524287
30	923647
31	1048575
32	1632255
33	2056191
34	2097151
35	2744319
36	4194303
37	6815743
38	8388607
39	8781823
40	8978431
41	12058623
42	16777215
43	19922943
44	24068095

[1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 1791, 2047, 2431, 4095, 8191, 14335, 14847, 16383, 27391, 32767, 44031, 57855, 65535, 114687, 131071, 204799, 262143, 376831, 524287, 923647, 1048575, 1632255, 2056191, 2097151, 2744319, 4194303, 6815743, 8388607, 8781823, 8978431, 12058623, 16777215, 19922943, 24068095]

cp's OEIS Frontend

A387418 Numbers k such that the odd part of (1+k) divides (1 + odd part of A034448(k)), where A034448 is unitary sigma (usigma).

Table of values

List of values