A171521 - cp's OEIS frontend

A171521 Numbers that are not the product of k-th composite number and k for any k >= 1.

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	18
17	19
18	20
19	21
20	22
21	23
22	25
23	26
24	27
25	28
26	29
27	30
28	31
29	32
30	33
31	34
32	35
33	37
34	38
35	39
36	40
37	41
38	42
39	43
40	44
41	45
42	46
43	47
44	48
45	49
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	71
67	73
68	74
69	75

[1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75]

cp's OEIS Frontend

A171521 Numbers that are not the product of k-th composite number and k for any k >= 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	18
17	19
18	20
19	21
20	22
21	23
22	25
23	26
24	27
25	28
26	29
27	30
28	31
29	32
30	33
31	34
32	35
33	37
34	38
35	39
36	40
37	41
38	42
39	43
40	44
41	45
42	46
43	47
44	48
45	49
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	71
67	73
68	74
69	75

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	18
17	19
18	20
19	21
20	22
21	23
22	25
23	26
24	27
25	28
26	29
27	30
28	31
29	32
30	33
31	34
32	35
33	37
34	38
35	39
36	40
37	41
38	42
39	43
40	44
41	45
42	46
43	47
44	48
45	49
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	71
67	73
68	74
69	75

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	13
12	14
13	15
14	16
15	17
16	18
17	19
18	20
19	21
20	22
21	23
22	25
23	26
24	27
25	28
26	29
27	30
28	31
29	32
30	33
31	34
32	35
33	37
34	38
35	39
36	40
37	41
38	42
39	43
40	44
41	45
42	46
43	47
44	48
45	49
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	71
67	73
68	74
69	75