A291043 - cp's OEIS frontend

A291043 Numbers n such that psi(n) = psi(n+1), where psi(n) is Dedekind psi function (A001615).

n	a(n)
1	4
2	8
3	14
4	15
5	32
6	44
7	45
8	62
9	63
10	75
11	135
12	188
13	195
14	567
15	608
16	663
17	704
18	825
19	956
20	957
21	1023
22	1034
23	1275
24	1334
25	1484
26	1634
27	1845
28	1935
29	2223
30	2534
31	2685
32	2751
33	2871
34	3195
35	3404
36	3843
37	3915
38	4994
39	7004
40	7315
41	7544
42	8024
43	8055
44	9207
45	10695
46	11205
47	11984
48	12032

[4, 8, 14, 15, 32, 44, 45, 62, 63, 75, 135, 188, 195, 567, 608, 663, 704, 825, 956, 957, 1023, 1034, 1275, 1334, 1484, 1634, 1845, 1935, 2223, 2534, 2685, 2751, 2871, 3195, 3404, 3843, 3915, 4994, 7004, 7315, 7544, 8024, 8055, 9207, 10695, 11205, 11984, 12032]

cp's OEIS Frontend

A291043 Numbers n such that psi(n) = psi(n+1), where psi(n) is Dedekind psi function (A001615).

Table of values

List of values