A328737 - cp's OEIS frontend

A328737 Numbers k such that at least one of sopfr(k-1) and sopfr(k+1) is greater than or equal to 3*sopfr(k).

n	a(n)
1	30
2	32
3	36
4	40
5	42
6	48
7	52
8	54
9	60
10	66
11	68
12	70
13	72
14	75
15	78
16	80
17	81
18	84
19	88
20	90
21	96
22	98
23	100
24	102
25	104
26	105
27	108
28	110
29	112
30	114
31	117
32	126
33	128
34	130
35	132
36	135
37	136
38	138
39	140
40	143
41	147
42	148
43	150
44	152
45	156
46	160
47	162
48	164
49	165
50	168
51	172
52	174
53	176
54	180

[30, 32, 36, 40, 42, 48, 52, 54, 60, 66, 68, 70, 72, 75, 78, 80, 81, 84, 88, 90, 96, 98, 100, 102, 104, 105, 108, 110, 112, 114, 117, 126, 128, 130, 132, 135, 136, 138, 140, 143, 147, 148, 150, 152, 156, 160, 162, 164, 165, 168, 172, 174, 176, 180]

cp's OEIS Frontend

A328737 Numbers k such that at least one of sopfr(k-1) and sopfr(k+1) is greater than or equal to 3*sopfr(k).

Table of values

List of values

n	a(n)
1	30
2	32
3	36
4	40
5	42
6	48
7	52
8	54
9	60
10	66
11	68
12	70
13	72
14	75
15	78
16	80
17	81
18	84
19	88
20	90
21	96
22	98
23	100
24	102
25	104
26	105
27	108
28	110
29	112
30	114
31	117
32	126
33	128
34	130
35	132
36	135
37	136
38	138
39	140
40	143
41	147
42	148
43	150
44	152
45	156
46	160
47	162
48	164
49	165
50	168
51	172
52	174
53	176
54	180

n	a(n)
1	30
2	32
3	36
4	40
5	42
6	48
7	52
8	54
9	60
10	66
11	68
12	70
13	72
14	75
15	78
16	80
17	81
18	84
19	88
20	90
21	96
22	98
23	100
24	102
25	104
26	105
27	108
28	110
29	112
30	114
31	117
32	126
33	128
34	130
35	132
36	135
37	136
38	138
39	140
40	143
41	147
42	148
43	150
44	152
45	156
46	160
47	162
48	164
49	165
50	168
51	172
52	174
53	176
54	180

n	a(n)
1	30
2	32
3	36
4	40
5	42
6	48
7	52
8	54
9	60
10	66
11	68
12	70
13	72
14	75
15	78
16	80
17	81
18	84
19	88
20	90
21	96
22	98
23	100
24	102
25	104
26	105
27	108
28	110
29	112
30	114
31	117
32	126
33	128
34	130
35	132
36	135
37	136
38	138
39	140
40	143
41	147
42	148
43	150
44	152
45	156
46	160
47	162
48	164
49	165
50	168
51	172
52	174
53	176
54	180