A285440 - cp's OEIS frontend

A285440 Consider the sums of the numbers < n that share the same greatest common divisor with n. Sequence lists numbers that have only one of those sums equal to n.

n	a(n)
1	3
2	4
3	8
4	9
5	15
6	16
7	20
8	21
9	27
10	28
11	32
12	33
13	39
14	40
15	44
16	45
17	51
18	52
19	56
20	57
21	63
22	64
23	68
24	69
25	75
26	76
27	80
28	81
29	87
30	88
31	92
32	93
33	99
34	100
35	104
36	105
37	111
38	112
39	116
40	117
41	123
42	124
43	128
44	129
45	135
46	136
47	140
48	141
49	147
50	148
51	152
52	153
53	159
54	160
55	164
56	165
57	171
58	172
59	176
60	177

[3, 4, 8, 9, 15, 16, 20, 21, 27, 28, 32, 33, 39, 40, 44, 45, 51, 52, 56, 57, 63, 64, 68, 69, 75, 76, 80, 81, 87, 88, 92, 93, 99, 100, 104, 105, 111, 112, 116, 117, 123, 124, 128, 129, 135, 136, 140, 141, 147, 148, 152, 153, 159, 160, 164, 165, 171, 172, 176, 177]

cp's OEIS Frontend

A285440 Consider the sums of the numbers < n that share the same greatest common divisor with n. Sequence lists numbers that have only one of those sums equal to n.

Table of values

List of values

n	a(n)
1	3
2	4
3	8
4	9
5	15
6	16
7	20
8	21
9	27
10	28
11	32
12	33
13	39
14	40
15	44
16	45
17	51
18	52
19	56
20	57
21	63
22	64
23	68
24	69
25	75
26	76
27	80
28	81
29	87
30	88
31	92
32	93
33	99
34	100
35	104
36	105
37	111
38	112
39	116
40	117
41	123
42	124
43	128
44	129
45	135
46	136
47	140
48	141
49	147
50	148
51	152
52	153
53	159
54	160
55	164
56	165
57	171
58	172
59	176
60	177

n	a(n)
1	3
2	4
3	8
4	9
5	15
6	16
7	20
8	21
9	27
10	28
11	32
12	33
13	39
14	40
15	44
16	45
17	51
18	52
19	56
20	57
21	63
22	64
23	68
24	69
25	75
26	76
27	80
28	81
29	87
30	88
31	92
32	93
33	99
34	100
35	104
36	105
37	111
38	112
39	116
40	117
41	123
42	124
43	128
44	129
45	135
46	136
47	140
48	141
49	147
50	148
51	152
52	153
53	159
54	160
55	164
56	165
57	171
58	172
59	176
60	177

n	a(n)
1	3
2	4
3	8
4	9
5	15
6	16
7	20
8	21
9	27
10	28
11	32
12	33
13	39
14	40
15	44
16	45
17	51
18	52
19	56
20	57
21	63
22	64
23	68
24	69
25	75
26	76
27	80
28	81
29	87
30	88
31	92
32	93
33	99
34	100
35	104
36	105
37	111
38	112
39	116
40	117
41	123
42	124
43	128
44	129
45	135
46	136
47	140
48	141
49	147
50	148
51	152
52	153
53	159
54	160
55	164
56	165
57	171
58	172
59	176
60	177