A179945 - cp's OEIS frontend

A179945 Numbers n such that both A000203(n)-n-1 and A000203(n)-2n-1 are prime numbers, and sigma(n)-2n-1 > 5.

n	a(n)
1	30
2	42
3	60
4	78
5	102
6	138
7	186
8	198
9	216
10	222
11	228
12	240
13	246
14	258
15	270
16	282
17	360
18	372
19	390
20	414
21	438
22	492
23	498
24	546
25	582
26	600
27	606
28	642
29	708
30	720
31	756
32	762
33	774
34	786
35	810
36	852
37	870
38	930
39	942
40	954
41	1002
42	1014
43	1020
44	1026
45	1038
46	1068
47	1086
48	1182
49	1266
50	1290

[30, 42, 60, 78, 102, 138, 186, 198, 216, 222, 228, 240, 246, 258, 270, 282, 360, 372, 390, 414, 438, 492, 498, 546, 582, 600, 606, 642, 708, 720, 756, 762, 774, 786, 810, 852, 870, 930, 942, 954, 1002, 1014, 1020, 1026, 1038, 1068, 1086, 1182, 1266, 1290]

cp's OEIS Frontend

A179945 Numbers n such that both A000203(n)-n-1 and A000203(n)-2n-1 are prime numbers, and sigma(n)-2n-1 > 5.

Table of values

List of values

cp's OEIS Frontend

A179945 Numbers n such that both A000203(n)-n-1 and A000203(n)-2*n-1 are prime numbers, and sigma(n)-2*n-1 > 5.

Table of values

List of values

A179945 Numbers n such that both A000203(n)-n-1 and A000203(n)-2n-1 are prime numbers, and sigma(n)-2n-1 > 5.