A337405 - cp's OEIS frontend

A337405 A fractal spiral on a 2D square lattice, one digit per cell, starting at the origin with 0. The odd digits reproduce the spiral itself at another scale (design of the digits is shown below).

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	7
7	9
8	4
9	10
10	6
11	8
12	21
13	11
14	20
15	22
16	23
17	13
18	24
19	26
20	28
21	40
22	42
23	44
24	25
25	15
26	17
27	46
28	48
29	60
30	62
31	19
32	31
33	12
34	33
35	27
36	35
37	29
38	14
39	64
40	66
41	16
42	37
43	68
44	41
45	80
46	18
47	82
48	84
49	86
50	43
51	30
52	88
53	32
54	200
55	45
56	34
57	202
58	47
59	49
60	201
61	204
62	36
63	61
64	206
65	208
66	220
67	222
68	63
69	39
70	65
71	51
72	67
73	53
74	224
75	226

[0, 1, 3, 2, 5, 7, 9, 4, 10, 6, 8, 21, 11, 20, 22, 23, 13, 24, 26, 28, 40, 42, 44, 25, 15, 17, 46, 48, 60, 62, 19, 31, 12, 33, 27, 35, 29, 14, 64, 66, 16, 37, 68, 41, 80, 18, 82, 84, 86, 43, 30, 88, 32, 200, 45, 34, 202, 47, 49, 201, 204, 36, 61, 206, 208, 220, 222, 63, 39, 65, 51, 67, 53, 224, 226]

cp's OEIS Frontend

A337405 A fractal spiral on a 2D square lattice, one digit per cell, starting at the origin with 0. The odd digits reproduce the spiral itself at another scale (design of the digits is shown below).

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	7
7	9
8	4
9	10
10	6
11	8
12	21
13	11
14	20
15	22
16	23
17	13
18	24
19	26
20	28
21	40
22	42
23	44
24	25
25	15
26	17
27	46
28	48
29	60
30	62
31	19
32	31
33	12
34	33
35	27
36	35
37	29
38	14
39	64
40	66
41	16
42	37
43	68
44	41
45	80
46	18
47	82
48	84
49	86
50	43
51	30
52	88
53	32
54	200
55	45
56	34
57	202
58	47
59	49
60	201
61	204
62	36
63	61
64	206
65	208
66	220
67	222
68	63
69	39
70	65
71	51
72	67
73	53
74	224
75	226

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	7
7	9
8	4
9	10
10	6
11	8
12	21
13	11
14	20
15	22
16	23
17	13
18	24
19	26
20	28
21	40
22	42
23	44
24	25
25	15
26	17
27	46
28	48
29	60
30	62
31	19
32	31
33	12
34	33
35	27
36	35
37	29
38	14
39	64
40	66
41	16
42	37
43	68
44	41
45	80
46	18
47	82
48	84
49	86
50	43
51	30
52	88
53	32
54	200
55	45
56	34
57	202
58	47
59	49
60	201
61	204
62	36
63	61
64	206
65	208
66	220
67	222
68	63
69	39
70	65
71	51
72	67
73	53
74	224
75	226

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	7
7	9
8	4
9	10
10	6
11	8
12	21
13	11
14	20
15	22
16	23
17	13
18	24
19	26
20	28
21	40
22	42
23	44
24	25
25	15
26	17
27	46
28	48
29	60
30	62
31	19
32	31
33	12
34	33
35	27
36	35
37	29
38	14
39	64
40	66
41	16
42	37
43	68
44	41
45	80
46	18
47	82
48	84
49	86
50	43
51	30
52	88
53	32
54	200
55	45
56	34
57	202
58	47
59	49
60	201
61	204
62	36
63	61
64	206
65	208
66	220
67	222
68	63
69	39
70	65
71	51
72	67
73	53
74	224
75	226