A161769 - cp's OEIS frontend

A161769 A positive integer n is included if the greatest common divisor of (the sum of the distinct primes dividing n) and (the sum of the exponents in the prime-factorization of n) is > 1.

n	a(n)
1	4
2	15
3	16
4	21
5	27
6	28
7	33
8	35
9	39
10	42
11	48
12	51
13	52
14	55
15	57
16	60
17	64
18	65
19	69
20	72
21	76
22	77
23	78
24	84
25	85
26	87
27	90
28	91
29	93
30	95
31	98
32	105
33	108
34	110
35	111
36	114
37	115
38	119
39	120
40	123
41	124
42	126
43	129
44	132
45	133
46	135
47	140
48	141
49	143
50	145
51	148
52	150
53	155
54	156
55	159
56	161
57	162
58	170
59	172
60	175

[4, 15, 16, 21, 27, 28, 33, 35, 39, 42, 48, 51, 52, 55, 57, 60, 64, 65, 69, 72, 76, 77, 78, 84, 85, 87, 90, 91, 93, 95, 98, 105, 108, 110, 111, 114, 115, 119, 120, 123, 124, 126, 129, 132, 133, 135, 140, 141, 143, 145, 148, 150, 155, 156, 159, 161, 162, 170, 172, 175]

cp's OEIS Frontend

A161769 A positive integer n is included if the greatest common divisor of (the sum of the distinct primes dividing n) and (the sum of the exponents in the prime-factorization of n) is > 1.

Table of values

List of values

n	a(n)
1	4
2	15
3	16
4	21
5	27
6	28
7	33
8	35
9	39
10	42
11	48
12	51
13	52
14	55
15	57
16	60
17	64
18	65
19	69
20	72
21	76
22	77
23	78
24	84
25	85
26	87
27	90
28	91
29	93
30	95
31	98
32	105
33	108
34	110
35	111
36	114
37	115
38	119
39	120
40	123
41	124
42	126
43	129
44	132
45	133
46	135
47	140
48	141
49	143
50	145
51	148
52	150
53	155
54	156
55	159
56	161
57	162
58	170
59	172
60	175

n	a(n)
1	4
2	15
3	16
4	21
5	27
6	28
7	33
8	35
9	39
10	42
11	48
12	51
13	52
14	55
15	57
16	60
17	64
18	65
19	69
20	72
21	76
22	77
23	78
24	84
25	85
26	87
27	90
28	91
29	93
30	95
31	98
32	105
33	108
34	110
35	111
36	114
37	115
38	119
39	120
40	123
41	124
42	126
43	129
44	132
45	133
46	135
47	140
48	141
49	143
50	145
51	148
52	150
53	155
54	156
55	159
56	161
57	162
58	170
59	172
60	175

n	a(n)
1	4
2	15
3	16
4	21
5	27
6	28
7	33
8	35
9	39
10	42
11	48
12	51
13	52
14	55
15	57
16	60
17	64
18	65
19	69
20	72
21	76
22	77
23	78
24	84
25	85
26	87
27	90
28	91
29	93
30	95
31	98
32	105
33	108
34	110
35	111
36	114
37	115
38	119
39	120
40	123
41	124
42	126
43	129
44	132
45	133
46	135
47	140
48	141
49	143
50	145
51	148
52	150
53	155
54	156
55	159
56	161
57	162
58	170
59	172
60	175