A085273 - cp's OEIS frontend

A085273 Difference between n-th composite number and its largest prime divisor.

n	a(n)
1	2
2	3
3	6
4	6
5	5
6	9
7	7
8	10
9	14
10	15
11	15
12	14
13	11
14	21
15	20
16	13
17	24
18	21
19	25
20	30
21	22
22	17
23	28
24	33
25	19
26	26
27	35
28	35
29	33
30	40
31	23
32	45
33	42
34	45
35	34
36	39
37	51
38	44
39	49
40	38
41	29
42	55
43	31
44	56
45	62
46	52
47	55
48	51
49	46
50	63
51	69
52	37
53	70
54	57
55	66
56	65
57	75
58	78
59	41
60	77
61	68
62	43
63	58
64	77
65	85
66	78
67	69
68	62
69	47
70	76
71	93
72	91

[2, 3, 6, 6, 5, 9, 7, 10, 14, 15, 15, 14, 11, 21, 20, 13, 24, 21, 25, 30, 22, 17, 28, 33, 19, 26, 35, 35, 33, 40, 23, 45, 42, 45, 34, 39, 51, 44, 49, 38, 29, 55, 31, 56, 62, 52, 55, 51, 46, 63, 69, 37, 70, 57, 66, 65, 75, 78, 41, 77, 68, 43, 58, 77, 85, 78, 69, 62, 47, 76, 93, 91]

cp's OEIS Frontend

A085273 Difference between n-th composite number and its largest prime divisor.

Table of values

List of values

n	a(n)
1	2
2	3
3	6
4	6
5	5
6	9
7	7
8	10
9	14
10	15
11	15
12	14
13	11
14	21
15	20
16	13
17	24
18	21
19	25
20	30
21	22
22	17
23	28
24	33
25	19
26	26
27	35
28	35
29	33
30	40
31	23
32	45
33	42
34	45
35	34
36	39
37	51
38	44
39	49
40	38
41	29
42	55
43	31
44	56
45	62
46	52
47	55
48	51
49	46
50	63
51	69
52	37
53	70
54	57
55	66
56	65
57	75
58	78
59	41
60	77
61	68
62	43
63	58
64	77
65	85
66	78
67	69
68	62
69	47
70	76
71	93
72	91

n	a(n)
1	2
2	3
3	6
4	6
5	5
6	9
7	7
8	10
9	14
10	15
11	15
12	14
13	11
14	21
15	20
16	13
17	24
18	21
19	25
20	30
21	22
22	17
23	28
24	33
25	19
26	26
27	35
28	35
29	33
30	40
31	23
32	45
33	42
34	45
35	34
36	39
37	51
38	44
39	49
40	38
41	29
42	55
43	31
44	56
45	62
46	52
47	55
48	51
49	46
50	63
51	69
52	37
53	70
54	57
55	66
56	65
57	75
58	78
59	41
60	77
61	68
62	43
63	58
64	77
65	85
66	78
67	69
68	62
69	47
70	76
71	93
72	91

n	a(n)
1	2
2	3
3	6
4	6
5	5
6	9
7	7
8	10
9	14
10	15
11	15
12	14
13	11
14	21
15	20
16	13
17	24
18	21
19	25
20	30
21	22
22	17
23	28
24	33
25	19
26	26
27	35
28	35
29	33
30	40
31	23
32	45
33	42
34	45
35	34
36	39
37	51
38	44
39	49
40	38
41	29
42	55
43	31
44	56
45	62
46	52
47	55
48	51
49	46
50	63
51	69
52	37
53	70
54	57
55	66
56	65
57	75
58	78
59	41
60	77
61	68
62	43
63	58
64	77
65	85
66	78
67	69
68	62
69	47
70	76
71	93
72	91