A344659 - cp's OEIS frontend

A344659 Lexicographically earliest sequence of distinct nonnegative terms on a square spiral such that each term forms no prime value in the eight sums when each term is added to each of its eight nearest neighbors.

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

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

cp's OEIS Frontend

A344659 Lexicographically earliest sequence of distinct nonnegative terms on a square spiral such that each term forms no prime value in the eight sums when each term is added to each of its eight nearest neighbors.

Table of values

List of values

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

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

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