A074320 - cp's OEIS frontend

A074320 a(n) = sum of smallest and largest prime factors of n, for n>1; a(1)=2.

n	a(n)
1	2
2	4
3	6
4	4
5	10
6	5
7	14
8	4
9	6
10	7
11	22
12	5
13	26
14	9
15	8
16	4
17	34
18	5
19	38
20	7
21	10
22	13
23	46
24	5
25	10
26	15
27	6
28	9
29	58
30	7
31	62
32	4
33	14
34	19
35	12
36	5
37	74
38	21
39	16
40	7
41	82
42	9
43	86
44	13
45	8
46	25
47	94
48	5
49	14
50	7
51	20
52	15
53	106
54	5
55	16
56	9
57	22
58	31
59	118
60	7
61	122
62	33
63	10
64	4
65	18
66	13
67	134
68	19
69	26
70	9
71	142
72	5
73	146
74	39
75	8
76	21
77	18
78	15

[2, 4, 6, 4, 10, 5, 14, 4, 6, 7, 22, 5, 26, 9, 8, 4, 34, 5, 38, 7, 10, 13, 46, 5, 10, 15, 6, 9, 58, 7, 62, 4, 14, 19, 12, 5, 74, 21, 16, 7, 82, 9, 86, 13, 8, 25, 94, 5, 14, 7, 20, 15, 106, 5, 16, 9, 22, 31, 118, 7, 122, 33, 10, 4, 18, 13, 134, 19, 26, 9, 142, 5, 146, 39, 8, 21, 18, 15]

cp's OEIS Frontend

A074320 a(n) = sum of smallest and largest prime factors of n, for n>1; a(1)=2.

Table of values

List of values

n	a(n)
1	2
2	4
3	6
4	4
5	10
6	5
7	14
8	4
9	6
10	7
11	22
12	5
13	26
14	9
15	8
16	4
17	34
18	5
19	38
20	7
21	10
22	13
23	46
24	5
25	10
26	15
27	6
28	9
29	58
30	7
31	62
32	4
33	14
34	19
35	12
36	5
37	74
38	21
39	16
40	7
41	82
42	9
43	86
44	13
45	8
46	25
47	94
48	5
49	14
50	7
51	20
52	15
53	106
54	5
55	16
56	9
57	22
58	31
59	118
60	7
61	122
62	33
63	10
64	4
65	18
66	13
67	134
68	19
69	26
70	9
71	142
72	5
73	146
74	39
75	8
76	21
77	18
78	15

n	a(n)
1	2
2	4
3	6
4	4
5	10
6	5
7	14
8	4
9	6
10	7
11	22
12	5
13	26
14	9
15	8
16	4
17	34
18	5
19	38
20	7
21	10
22	13
23	46
24	5
25	10
26	15
27	6
28	9
29	58
30	7
31	62
32	4
33	14
34	19
35	12
36	5
37	74
38	21
39	16
40	7
41	82
42	9
43	86
44	13
45	8
46	25
47	94
48	5
49	14
50	7
51	20
52	15
53	106
54	5
55	16
56	9
57	22
58	31
59	118
60	7
61	122
62	33
63	10
64	4
65	18
66	13
67	134
68	19
69	26
70	9
71	142
72	5
73	146
74	39
75	8
76	21
77	18
78	15

n	a(n)
1	2
2	4
3	6
4	4
5	10
6	5
7	14
8	4
9	6
10	7
11	22
12	5
13	26
14	9
15	8
16	4
17	34
18	5
19	38
20	7
21	10
22	13
23	46
24	5
25	10
26	15
27	6
28	9
29	58
30	7
31	62
32	4
33	14
34	19
35	12
36	5
37	74
38	21
39	16
40	7
41	82
42	9
43	86
44	13
45	8
46	25
47	94
48	5
49	14
50	7
51	20
52	15
53	106
54	5
55	16
56	9
57	22
58	31
59	118
60	7
61	122
62	33
63	10
64	4
65	18
66	13
67	134
68	19
69	26
70	9
71	142
72	5
73	146
74	39
75	8
76	21
77	18
78	15