A197640 - cp's OEIS frontend

A197640 Numbers not representable as the sum of two coprime, squarefree, composite, positive integers.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	28
29	30
30	32
31	33
32	34
33	35
34	36
35	38
36	39
37	40
38	42
39	44
40	45
41	46
42	48
43	50
44	51
45	52
46	54
47	56
48	58
49	60
50	62
51	63
52	64
53	66
54	70
55	72
56	75
57	78
58	80
59	82
60	84
61	88
62	90
63	96
64	100
65	102
66	105
67	108
68	110
69	114
70	120
71	126
72	130
73	132
74	138
75	140
76	144
77	150
78	156
79	168
80	180
81	190
82	204
83	210
84	240
85	270
86	330
87	420

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 50, 51, 52, 54, 56, 58, 60, 62, 63, 64, 66, 70, 72, 75, 78, 80, 82, 84, 88, 90, 96, 100, 102, 105, 108, 110, 114, 120, 126, 130, 132, 138, 140, 144, 150, 156, 168, 180, 190, 204, 210, 240, 270, 330, 420]

cp's OEIS Frontend

A197640 Numbers not representable as the sum of two coprime, squarefree, composite, positive integers.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	28
29	30
30	32
31	33
32	34
33	35
34	36
35	38
36	39
37	40
38	42
39	44
40	45
41	46
42	48
43	50
44	51
45	52
46	54
47	56
48	58
49	60
50	62
51	63
52	64
53	66
54	70
55	72
56	75
57	78
58	80
59	82
60	84
61	88
62	90
63	96
64	100
65	102
66	105
67	108
68	110
69	114
70	120
71	126
72	130
73	132
74	138
75	140
76	144
77	150
78	156
79	168
80	180
81	190
82	204
83	210
84	240
85	270
86	330
87	420

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	28
29	30
30	32
31	33
32	34
33	35
34	36
35	38
36	39
37	40
38	42
39	44
40	45
41	46
42	48
43	50
44	51
45	52
46	54
47	56
48	58
49	60
50	62
51	63
52	64
53	66
54	70
55	72
56	75
57	78
58	80
59	82
60	84
61	88
62	90
63	96
64	100
65	102
66	105
67	108
68	110
69	114
70	120
71	126
72	130
73	132
74	138
75	140
76	144
77	150
78	156
79	168
80	180
81	190
82	204
83	210
84	240
85	270
86	330
87	420

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	28
29	30
30	32
31	33
32	34
33	35
34	36
35	38
36	39
37	40
38	42
39	44
40	45
41	46
42	48
43	50
44	51
45	52
46	54
47	56
48	58
49	60
50	62
51	63
52	64
53	66
54	70
55	72
56	75
57	78
58	80
59	82
60	84
61	88
62	90
63	96
64	100
65	102
66	105
67	108
68	110
69	114
70	120
71	126
72	130
73	132
74	138
75	140
76	144
77	150
78	156
79	168
80	180
81	190
82	204
83	210
84	240
85	270
86	330
87	420