A111234 - cp's OEIS frontend

A111234 a(1)=2; thereafter a(n) = (largest proper divisor of n) + (smallest prime divisor of n).

n	a(n)
1	2
2	3
3	4
4	4
5	6
6	5
7	8
8	6
9	6
10	7
11	12
12	8
13	14
14	9
15	8
16	10
17	18
18	11
19	20
20	12
21	10
22	13
23	24
24	14
25	10
26	15
27	12
28	16
29	30
30	17
31	32
32	18
33	14
34	19
35	12
36	20
37	38
38	21
39	16
40	22
41	42
42	23
43	44
44	24
45	18
46	25
47	48
48	26
49	14
50	27
51	20
52	28
53	54
54	29
55	16
56	30
57	22
58	31
59	60
60	32
61	62
62	33
63	24
64	34
65	18
66	35
67	68
68	36
69	26
70	37
71	72
72	38
73	74
74	39

[2, 3, 4, 4, 6, 5, 8, 6, 6, 7, 12, 8, 14, 9, 8, 10, 18, 11, 20, 12, 10, 13, 24, 14, 10, 15, 12, 16, 30, 17, 32, 18, 14, 19, 12, 20, 38, 21, 16, 22, 42, 23, 44, 24, 18, 25, 48, 26, 14, 27, 20, 28, 54, 29, 16, 30, 22, 31, 60, 32, 62, 33, 24, 34, 18, 35, 68, 36, 26, 37, 72, 38, 74, 39]

cp's OEIS Frontend

A111234 a(1)=2; thereafter a(n) = (largest proper divisor of n) + (smallest prime divisor of n).

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	4
5	6
6	5
7	8
8	6
9	6
10	7
11	12
12	8
13	14
14	9
15	8
16	10
17	18
18	11
19	20
20	12
21	10
22	13
23	24
24	14
25	10
26	15
27	12
28	16
29	30
30	17
31	32
32	18
33	14
34	19
35	12
36	20
37	38
38	21
39	16
40	22
41	42
42	23
43	44
44	24
45	18
46	25
47	48
48	26
49	14
50	27
51	20
52	28
53	54
54	29
55	16
56	30
57	22
58	31
59	60
60	32
61	62
62	33
63	24
64	34
65	18
66	35
67	68
68	36
69	26
70	37
71	72
72	38
73	74
74	39

n	a(n)
1	2
2	3
3	4
4	4
5	6
6	5
7	8
8	6
9	6
10	7
11	12
12	8
13	14
14	9
15	8
16	10
17	18
18	11
19	20
20	12
21	10
22	13
23	24
24	14
25	10
26	15
27	12
28	16
29	30
30	17
31	32
32	18
33	14
34	19
35	12
36	20
37	38
38	21
39	16
40	22
41	42
42	23
43	44
44	24
45	18
46	25
47	48
48	26
49	14
50	27
51	20
52	28
53	54
54	29
55	16
56	30
57	22
58	31
59	60
60	32
61	62
62	33
63	24
64	34
65	18
66	35
67	68
68	36
69	26
70	37
71	72
72	38
73	74
74	39

n	a(n)
1	2
2	3
3	4
4	4
5	6
6	5
7	8
8	6
9	6
10	7
11	12
12	8
13	14
14	9
15	8
16	10
17	18
18	11
19	20
20	12
21	10
22	13
23	24
24	14
25	10
26	15
27	12
28	16
29	30
30	17
31	32
32	18
33	14
34	19
35	12
36	20
37	38
38	21
39	16
40	22
41	42
42	23
43	44
44	24
45	18
46	25
47	48
48	26
49	14
50	27
51	20
52	28
53	54
54	29
55	16
56	30
57	22
58	31
59	60
60	32
61	62
62	33
63	24
64	34
65	18
66	35
67	68
68	36
69	26
70	37
71	72
72	38
73	74
74	39