A354435 - cp's OEIS frontend

A354435 Lexicographically earliest sequence of distinct positive integers on a square spiral such that any 3 X 3 square of numbers sums to a prime, and these primes are distinct.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	9
11	10
12	13
13	12
14	14
15	20
16	16
17	15
18	17
19	19
20	22
21	18
22	21
23	25
24	26
25	39
26	23
27	24
28	29
29	36
30	30
31	27
32	28
33	34
34	35
35	48
36	31
37	32
38	33
39	42
40	40
41	41
42	37
43	38
44	43
45	44
46	45
47	54
48	46
49	49
50	47
51	50
52	60
53	63
54	67
55	53
56	51
57	52
58	55
59	59
60	72
61	75
62	65
63	68
64	81
65	56
66	57
67	58
68	74
69	85
70	61
71	86
72	73
73	62
74	64
75	66
76	90
77	87

[1, 2, 3, 4, 5, 6, 7, 8, 11, 9, 10, 13, 12, 14, 20, 16, 15, 17, 19, 22, 18, 21, 25, 26, 39, 23, 24, 29, 36, 30, 27, 28, 34, 35, 48, 31, 32, 33, 42, 40, 41, 37, 38, 43, 44, 45, 54, 46, 49, 47, 50, 60, 63, 67, 53, 51, 52, 55, 59, 72, 75, 65, 68, 81, 56, 57, 58, 74, 85, 61, 86, 73, 62, 64, 66, 90, 87]

cp's OEIS Frontend

A354435 Lexicographically earliest sequence of distinct positive integers on a square spiral such that any 3 X 3 square of numbers sums to a prime, and these primes are distinct.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	9
11	10
12	13
13	12
14	14
15	20
16	16
17	15
18	17
19	19
20	22
21	18
22	21
23	25
24	26
25	39
26	23
27	24
28	29
29	36
30	30
31	27
32	28
33	34
34	35
35	48
36	31
37	32
38	33
39	42
40	40
41	41
42	37
43	38
44	43
45	44
46	45
47	54
48	46
49	49
50	47
51	50
52	60
53	63
54	67
55	53
56	51
57	52
58	55
59	59
60	72
61	75
62	65
63	68
64	81
65	56
66	57
67	58
68	74
69	85
70	61
71	86
72	73
73	62
74	64
75	66
76	90
77	87

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	9
11	10
12	13
13	12
14	14
15	20
16	16
17	15
18	17
19	19
20	22
21	18
22	21
23	25
24	26
25	39
26	23
27	24
28	29
29	36
30	30
31	27
32	28
33	34
34	35
35	48
36	31
37	32
38	33
39	42
40	40
41	41
42	37
43	38
44	43
45	44
46	45
47	54
48	46
49	49
50	47
51	50
52	60
53	63
54	67
55	53
56	51
57	52
58	55
59	59
60	72
61	75
62	65
63	68
64	81
65	56
66	57
67	58
68	74
69	85
70	61
71	86
72	73
73	62
74	64
75	66
76	90
77	87

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	9
11	10
12	13
13	12
14	14
15	20
16	16
17	15
18	17
19	19
20	22
21	18
22	21
23	25
24	26
25	39
26	23
27	24
28	29
29	36
30	30
31	27
32	28
33	34
34	35
35	48
36	31
37	32
38	33
39	42
40	40
41	41
42	37
43	38
44	43
45	44
46	45
47	54
48	46
49	49
50	47
51	50
52	60
53	63
54	67
55	53
56	51
57	52
58	55
59	59
60	72
61	75
62	65
63	68
64	81
65	56
66	57
67	58
68	74
69	85
70	61
71	86
72	73
73	62
74	64
75	66
76	90
77	87