A099633 - cp's OEIS frontend

A099633 Numbers k such that (phi(k-2) + phi(k+2))/2 = phi(k); 2-phi/balanced numbers.

n	a(n)
1	5
2	10
3	14
4	20
5	25
6	50
7	80
8	154
9	200
10	434
11	520
12	610
13	815
14	1205
15	1345
16	2680
17	3200
18	3560
19	4669
20	7330
21	9290
22	10130
23	11705
24	17630
25	24410
26	25090
27	33385
28	34205
29	39754
30	39785
31	40870
32	48470
33	55979
34	59090
35	73165
36	75470
37	78035
38	95990
39	107680
40	115685
41	120230

[5, 10, 14, 20, 25, 50, 80, 154, 200, 434, 520, 610, 815, 1205, 1345, 2680, 3200, 3560, 4669, 7330, 9290, 10130, 11705, 17630, 24410, 25090, 33385, 34205, 39754, 39785, 40870, 48470, 55979, 59090, 73165, 75470, 78035, 95990, 107680, 115685, 120230]

cp's OEIS Frontend

A099633 Numbers k such that (phi(k-2) + phi(k+2))/2 = phi(k); 2-phi/balanced numbers.

Table of values

List of values