A345011 - cp's OEIS frontend

A345011 Lexicographically earliest sequence of nonnegative terms forming a clockwise square spiral when nothing else is read except the nonprime/prime nature of the terms (see the Comments section).

n	a(n)
1	0
2	2
3	3
4	1
5	5
6	4
7	7
8	6
9	8
10	11
11	9
12	10
13	13
14	12
15	14
16	15
17	17
18	16
19	18
20	20
21	19
22	21
23	22
24	24
25	25
26	23
27	26
28	27
29	28
30	30
31	29
32	32
33	33
34	34
35	35
36	36
37	31
38	38
39	39
40	40
41	42
42	44
43	37
44	45
45	46
46	48
47	49
48	50
49	51
50	41
51	52
52	54
53	55
54	56
55	57
56	58
57	43
58	60
59	62
60	63
61	64
62	65
63	66
64	68
65	47
66	69
67	70
68	72
69	74
70	75
71	76
72	77
73	53
74	78
75	80
76	81
77	82
78	84
79	85
80	86

[0, 2, 3, 1, 5, 4, 7, 6, 8, 11, 9, 10, 13, 12, 14, 15, 17, 16, 18, 20, 19, 21, 22, 24, 25, 23, 26, 27, 28, 30, 29, 32, 33, 34, 35, 36, 31, 38, 39, 40, 42, 44, 37, 45, 46, 48, 49, 50, 51, 41, 52, 54, 55, 56, 57, 58, 43, 60, 62, 63, 64, 65, 66, 68, 47, 69, 70, 72, 74, 75, 76, 77, 53, 78, 80, 81, 82, 84, 85, 86]

cp's OEIS Frontend

A345011 Lexicographically earliest sequence of nonnegative terms forming a clockwise square spiral when nothing else is read except the nonprime/prime nature of the terms (see the Comments section).

Table of values

List of values

n	a(n)
1	0
2	2
3	3
4	1
5	5
6	4
7	7
8	6
9	8
10	11
11	9
12	10
13	13
14	12
15	14
16	15
17	17
18	16
19	18
20	20
21	19
22	21
23	22
24	24
25	25
26	23
27	26
28	27
29	28
30	30
31	29
32	32
33	33
34	34
35	35
36	36
37	31
38	38
39	39
40	40
41	42
42	44
43	37
44	45
45	46
46	48
47	49
48	50
49	51
50	41
51	52
52	54
53	55
54	56
55	57
56	58
57	43
58	60
59	62
60	63
61	64
62	65
63	66
64	68
65	47
66	69
67	70
68	72
69	74
70	75
71	76
72	77
73	53
74	78
75	80
76	81
77	82
78	84
79	85
80	86

n	a(n)
1	0
2	2
3	3
4	1
5	5
6	4
7	7
8	6
9	8
10	11
11	9
12	10
13	13
14	12
15	14
16	15
17	17
18	16
19	18
20	20
21	19
22	21
23	22
24	24
25	25
26	23
27	26
28	27
29	28
30	30
31	29
32	32
33	33
34	34
35	35
36	36
37	31
38	38
39	39
40	40
41	42
42	44
43	37
44	45
45	46
46	48
47	49
48	50
49	51
50	41
51	52
52	54
53	55
54	56
55	57
56	58
57	43
58	60
59	62
60	63
61	64
62	65
63	66
64	68
65	47
66	69
67	70
68	72
69	74
70	75
71	76
72	77
73	53
74	78
75	80
76	81
77	82
78	84
79	85
80	86

n	a(n)
1	0
2	2
3	3
4	1
5	5
6	4
7	7
8	6
9	8
10	11
11	9
12	10
13	13
14	12
15	14
16	15
17	17
18	16
19	18
20	20
21	19
22	21
23	22
24	24
25	25
26	23
27	26
28	27
29	28
30	30
31	29
32	32
33	33
34	34
35	35
36	36
37	31
38	38
39	39
40	40
41	42
42	44
43	37
44	45
45	46
46	48
47	49
48	50
49	51
50	41
51	52
52	54
53	55
54	56
55	57
56	58
57	43
58	60
59	62
60	63
61	64
62	65
63	66
64	68
65	47
66	69
67	70
68	72
69	74
70	75
71	76
72	77
73	53
74	78
75	80
76	81
77	82
78	84
79	85
80	86