A284278 - cp's OEIS frontend

A284278 a(1)=2; for n >= 1, if n+2 is prime then a(2n+1) = 3n + 2 and a(2*n) = n + 2, otherwise all terms are 2.

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

[2, 3, 5, 4, 2, 5, 9, 6, 2, 7, 13, 8, 2, 9, 2, 10, 2, 11, 21, 12, 2, 13, 25, 14, 2, 15, 2, 16, 2, 17, 33, 18, 2, 19, 37, 20, 2, 21, 2, 22, 2, 23, 45, 24, 2, 25, 2, 26, 2, 27, 2, 28, 2, 29, 57, 30, 2, 31, 61, 32, 2, 33, 2, 34, 2, 35, 2, 36, 2, 37, 73, 38, 2, 39]

cp's OEIS Frontend

A284278 a(1)=2; for n >= 1, if n+2 is prime then a(2n+1) = 3n + 2 and a(2*n) = n + 2, otherwise all terms are 2.

Table of values

List of values

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

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

cp's OEIS Frontend

A284278 a(1)=2; for n >= 1, if n+2 is prime then a(2*n+1) = 3*n + 2 and a(2*n) = n + 2, otherwise all terms are 2.

Table of values

List of values

A284278 a(1)=2; for n >= 1, if n+2 is prime then a(2n+1) = 3n + 2 and a(2*n) = n + 2, otherwise all terms are 2.

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