A175938 - cp's OEIS frontend

A175938 Repeat: Take next nonprime, next prime, next nonprime, then reverse the order.

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

[4, 2, 1, 8, 3, 6, 10, 5, 9, 14, 7, 12, 16, 11, 15, 20, 13, 18, 22, 17, 21, 25, 19, 24, 27, 23, 26, 30, 29, 28, 33, 31, 32, 35, 37, 34, 38, 41, 36, 40, 43, 39, 44, 47, 42, 46, 45, 53, 49, 48, 59, 51, 50, 61, 54, 52, 67, 56, 55, 71]

cp's OEIS Frontend

A175938 Repeat: Take next nonprime, next prime, next nonprime, then reverse the order.

Table of values

List of values

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

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

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