A308094 - cp's OEIS frontend

A308094 Arrange distinct numbers in a single square spiral so that the absolute difference between each number and its eight neighbors is unique.

n	a(n)
1	1
2	2
3	4
4	8
5	13
6	21
7	10
8	31
9	17
10	34
11	52
12	26
13	45
14	68
15	41
16	66
17	97
18	131
19	57
20	96
21	50
22	139
23	69
24	114
25	165
26	83
27	219
28	107
29	168
30	102
31	158
32	221
33	136
34	198
35	265
36	166
37	3
38	237
39	309
40	386
41	183
42	261
43	140
44	349
45	240
46	319
47	411
48	270
49	363
50	179
51	461
52	322
53	426
54	279
55	381
56	488
57	6
58	364

[1, 2, 4, 8, 13, 21, 10, 31, 17, 34, 52, 26, 45, 68, 41, 66, 97, 131, 57, 96, 50, 139, 69, 114, 165, 83, 219, 107, 168, 102, 158, 221, 136, 198, 265, 166, 3, 237, 309, 386, 183, 261, 140, 349, 240, 319, 411, 270, 363, 179, 461, 322, 426, 279, 381, 488, 6, 364]

cp's OEIS Frontend

A308094 Arrange distinct numbers in a single square spiral so that the absolute difference between each number and its eight neighbors is unique.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	8
5	13
6	21
7	10
8	31
9	17
10	34
11	52
12	26
13	45
14	68
15	41
16	66
17	97
18	131
19	57
20	96
21	50
22	139
23	69
24	114
25	165
26	83
27	219
28	107
29	168
30	102
31	158
32	221
33	136
34	198
35	265
36	166
37	3
38	237
39	309
40	386
41	183
42	261
43	140
44	349
45	240
46	319
47	411
48	270
49	363
50	179
51	461
52	322
53	426
54	279
55	381
56	488
57	6
58	364

n	a(n)
1	1
2	2
3	4
4	8
5	13
6	21
7	10
8	31
9	17
10	34
11	52
12	26
13	45
14	68
15	41
16	66
17	97
18	131
19	57
20	96
21	50
22	139
23	69
24	114
25	165
26	83
27	219
28	107
29	168
30	102
31	158
32	221
33	136
34	198
35	265
36	166
37	3
38	237
39	309
40	386
41	183
42	261
43	140
44	349
45	240
46	319
47	411
48	270
49	363
50	179
51	461
52	322
53	426
54	279
55	381
56	488
57	6
58	364

n	a(n)
1	1
2	2
3	4
4	8
5	13
6	21
7	10
8	31
9	17
10	34
11	52
12	26
13	45
14	68
15	41
16	66
17	97
18	131
19	57
20	96
21	50
22	139
23	69
24	114
25	165
26	83
27	219
28	107
29	168
30	102
31	158
32	221
33	136
34	198
35	265
36	166
37	3
38	237
39	309
40	386
41	183
42	261
43	140
44	349
45	240
46	319
47	411
48	270
49	363
50	179
51	461
52	322
53	426
54	279
55	381
56	488
57	6
58	364