A387415 - cp's OEIS frontend

A387415 Numbers k such that the odd part of (1+k) divides (1 + odd part of A001615(k)), where A001615 is Dedekind's psi-function.

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	4095
14	8191
15	14335
16	16383
17	27135
18	32767
19	44031
20	57855
21	65535
22	75775
23	131071
24	204799
25	262143
26	376831
27	524287
28	667135
29	923647
30	1048575
31	1441791
32	1632255
33	2056191
34	2097151
35	2315775
36	2744319
37	4194303
38	6768639
39	6815743
40	8388607
41	8781823
42	16777215
43	19922943
44	24068095

[1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 2431, 4095, 8191, 14335, 16383, 27135, 32767, 44031, 57855, 65535, 75775, 131071, 204799, 262143, 376831, 524287, 667135, 923647, 1048575, 1441791, 1632255, 2056191, 2097151, 2315775, 2744319, 4194303, 6768639, 6815743, 8388607, 8781823, 16777215, 19922943, 24068095]

cp's OEIS Frontend

A387415 Numbers k such that the odd part of (1+k) divides (1 + odd part of A001615(k)), where A001615 is Dedekind's psi-function.

Table of values

List of values