A361724 - cp's OEIS frontend

A361724 Lexicographically earliest sequence of distinct positive numbers on a square spiral such that the eight sums of each number with its eight nearest neighbors are distinct across the entire spiral and no number on the spiral equals any such sum.

n	a(n)
1	1
2	2
3	4
4	7
5	12
6	14
7	16
8	22
9	27
10	10
11	31
12	40
13	39
14	46
15	47
16	20
17	45
18	52
19	61
20	60
21	18
22	80
23	68
24	81
25	82
26	70
27	89
28	94
29	83
30	48
31	62
32	105
33	100
34	69
35	117
36	25
37	111
38	129
39	127
40	124
41	143
42	106
43	112
44	132
45	155
46	119
47	126
48	128
49	63
50	56
51	157
52	158
53	107
54	178
55	193
56	168
57	118
58	170
59	55
60	195
61	189
62	197
63	192
64	206
65	182
66	211
67	202

[1, 2, 4, 7, 12, 14, 16, 22, 27, 10, 31, 40, 39, 46, 47, 20, 45, 52, 61, 60, 18, 80, 68, 81, 82, 70, 89, 94, 83, 48, 62, 105, 100, 69, 117, 25, 111, 129, 127, 124, 143, 106, 112, 132, 155, 119, 126, 128, 63, 56, 157, 158, 107, 178, 193, 168, 118, 170, 55, 195, 189, 197, 192, 206, 182, 211, 202]

cp's OEIS Frontend

A361724 Lexicographically earliest sequence of distinct positive numbers on a square spiral such that the eight sums of each number with its eight nearest neighbors are distinct across the entire spiral and no number on the spiral equals any such sum.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	7
5	12
6	14
7	16
8	22
9	27
10	10
11	31
12	40
13	39
14	46
15	47
16	20
17	45
18	52
19	61
20	60
21	18
22	80
23	68
24	81
25	82
26	70
27	89
28	94
29	83
30	48
31	62
32	105
33	100
34	69
35	117
36	25
37	111
38	129
39	127
40	124
41	143
42	106
43	112
44	132
45	155
46	119
47	126
48	128
49	63
50	56
51	157
52	158
53	107
54	178
55	193
56	168
57	118
58	170
59	55
60	195
61	189
62	197
63	192
64	206
65	182
66	211
67	202

n	a(n)
1	1
2	2
3	4
4	7
5	12
6	14
7	16
8	22
9	27
10	10
11	31
12	40
13	39
14	46
15	47
16	20
17	45
18	52
19	61
20	60
21	18
22	80
23	68
24	81
25	82
26	70
27	89
28	94
29	83
30	48
31	62
32	105
33	100
34	69
35	117
36	25
37	111
38	129
39	127
40	124
41	143
42	106
43	112
44	132
45	155
46	119
47	126
48	128
49	63
50	56
51	157
52	158
53	107
54	178
55	193
56	168
57	118
58	170
59	55
60	195
61	189
62	197
63	192
64	206
65	182
66	211
67	202

n	a(n)
1	1
2	2
3	4
4	7
5	12
6	14
7	16
8	22
9	27
10	10
11	31
12	40
13	39
14	46
15	47
16	20
17	45
18	52
19	61
20	60
21	18
22	80
23	68
24	81
25	82
26	70
27	89
28	94
29	83
30	48
31	62
32	105
33	100
34	69
35	117
36	25
37	111
38	129
39	127
40	124
41	143
42	106
43	112
44	132
45	155
46	119
47	126
48	128
49	63
50	56
51	157
52	158
53	107
54	178
55	193
56	168
57	118
58	170
59	55
60	195
61	189
62	197
63	192
64	206
65	182
66	211
67	202