A355314 - cp's OEIS frontend

A355314 Lexicographically earliest sequence of positive integers on a square spiral such that the difference between all orthogonally adjacent pairs of numbers is distinct.

n	a(n)
0	0
1	0
2	1
3	3
4	7
5	12
6	1
7	7
8	15
9	1
10	10
11	23
12	0
13	17
14	35
15	54
16	0
17	27
18	48
19	72
20	0
21	26
22	55
23	83
24	31
25	0
26	34
27	69
28	106
29	39
30	1
31	41
32	83
33	126
34	1
35	45
36	91
37	140
38	77
39	128
40	2
41	57
42	1
43	61
44	119
45	183
46	1
47	93
48	158
49	1
50	74
51	143
52	218
53	0
54	115
55	192
56	0
57	79
58	160
59	244
60	2
61	87
62	174
63	1
64	89
65	185
66	1
67	166
68	6
69	101
70	198
71	296
72	0
73	101
74	203
75	1

[0, 0, 1, 3, 7, 12, 1, 7, 15, 1, 10, 23, 0, 17, 35, 54, 0, 27, 48, 72, 0, 26, 55, 83, 31, 0, 34, 69, 106, 39, 1, 41, 83, 126, 1, 45, 91, 140, 77, 128, 2, 57, 1, 61, 119, 183, 1, 93, 158, 1, 74, 143, 218, 0, 115, 192, 0, 79, 160, 244, 2, 87, 174, 1, 89, 185, 1, 166, 6, 101, 198, 296, 0, 101, 203, 1]

cp's OEIS Frontend

A355314 Lexicographically earliest sequence of positive integers on a square spiral such that the difference between all orthogonally adjacent pairs of numbers is distinct.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	3
4	7
5	12
6	1
7	7
8	15
9	1
10	10
11	23
12	0
13	17
14	35
15	54
16	0
17	27
18	48
19	72
20	0
21	26
22	55
23	83
24	31
25	0
26	34
27	69
28	106
29	39
30	1
31	41
32	83
33	126
34	1
35	45
36	91
37	140
38	77
39	128
40	2
41	57
42	1
43	61
44	119
45	183
46	1
47	93
48	158
49	1
50	74
51	143
52	218
53	0
54	115
55	192
56	0
57	79
58	160
59	244
60	2
61	87
62	174
63	1
64	89
65	185
66	1
67	166
68	6
69	101
70	198
71	296
72	0
73	101
74	203
75	1

n	a(n)
0	0
1	0
2	1
3	3
4	7
5	12
6	1
7	7
8	15
9	1
10	10
11	23
12	0
13	17
14	35
15	54
16	0
17	27
18	48
19	72
20	0
21	26
22	55
23	83
24	31
25	0
26	34
27	69
28	106
29	39
30	1
31	41
32	83
33	126
34	1
35	45
36	91
37	140
38	77
39	128
40	2
41	57
42	1
43	61
44	119
45	183
46	1
47	93
48	158
49	1
50	74
51	143
52	218
53	0
54	115
55	192
56	0
57	79
58	160
59	244
60	2
61	87
62	174
63	1
64	89
65	185
66	1
67	166
68	6
69	101
70	198
71	296
72	0
73	101
74	203
75	1

n	a(n)
0	0
1	0
2	1
3	3
4	7
5	12
6	1
7	7
8	15
9	1
10	10
11	23
12	0
13	17
14	35
15	54
16	0
17	27
18	48
19	72
20	0
21	26
22	55
23	83
24	31
25	0
26	34
27	69
28	106
29	39
30	1
31	41
32	83
33	126
34	1
35	45
36	91
37	140
38	77
39	128
40	2
41	57
42	1
43	61
44	119
45	183
46	1
47	93
48	158
49	1
50	74
51	143
52	218
53	0
54	115
55	192
56	0
57	79
58	160
59	244
60	2
61	87
62	174
63	1
64	89
65	185
66	1
67	166
68	6
69	101
70	198
71	296
72	0
73	101
74	203
75	1