A337838 - cp's OEIS frontend

A337838 Permutation of the natural numbers formed by numbering an infinite square grid by a counterclockwise triangular spiral and visiting them by a counterclockwise stair step spiral.

n	a(n)
1	1
2	2
3	13
4	3
5	14
6	4
7	5
8	19
9	20
10	6
11	7
12	8
13	24
14	25
15	9
16	10
17	12
18	31
19	60
20	32
21	61
22	33
23	62
24	34
25	63
26	35
27	15
28	17
29	18
30	41
31	42
32	74
33	75
34	43
35	44
36	21
37	22
38	23
39	48
40	49
41	83
42	84
43	50
44	51
45	26
46	27
47	11
48	30
49	59
50	96
51	143
52	97
53	144
54	98
55	145
56	99
57	146
58	100
59	147
60	101
61	148
62	102
63	64
64	36
65	16

[1, 2, 13, 3, 14, 4, 5, 19, 20, 6, 7, 8, 24, 25, 9, 10, 12, 31, 60, 32, 61, 33, 62, 34, 63, 35, 15, 17, 18, 41, 42, 74, 75, 43, 44, 21, 22, 23, 48, 49, 83, 84, 50, 51, 26, 27, 11, 30, 59, 96, 143, 97, 144, 98, 145, 99, 146, 100, 147, 101, 148, 102, 64, 36, 16]

cp's OEIS Frontend

A337838 Permutation of the natural numbers formed by numbering an infinite square grid by a counterclockwise triangular spiral and visiting them by a counterclockwise stair step spiral.

Table of values

List of values

n	a(n)
1	1
2	2
3	13
4	3
5	14
6	4
7	5
8	19
9	20
10	6
11	7
12	8
13	24
14	25
15	9
16	10
17	12
18	31
19	60
20	32
21	61
22	33
23	62
24	34
25	63
26	35
27	15
28	17
29	18
30	41
31	42
32	74
33	75
34	43
35	44
36	21
37	22
38	23
39	48
40	49
41	83
42	84
43	50
44	51
45	26
46	27
47	11
48	30
49	59
50	96
51	143
52	97
53	144
54	98
55	145
56	99
57	146
58	100
59	147
60	101
61	148
62	102
63	64
64	36
65	16

n	a(n)
1	1
2	2
3	13
4	3
5	14
6	4
7	5
8	19
9	20
10	6
11	7
12	8
13	24
14	25
15	9
16	10
17	12
18	31
19	60
20	32
21	61
22	33
23	62
24	34
25	63
26	35
27	15
28	17
29	18
30	41
31	42
32	74
33	75
34	43
35	44
36	21
37	22
38	23
39	48
40	49
41	83
42	84
43	50
44	51
45	26
46	27
47	11
48	30
49	59
50	96
51	143
52	97
53	144
54	98
55	145
56	99
57	146
58	100
59	147
60	101
61	148
62	102
63	64
64	36
65	16

n	a(n)
1	1
2	2
3	13
4	3
5	14
6	4
7	5
8	19
9	20
10	6
11	7
12	8
13	24
14	25
15	9
16	10
17	12
18	31
19	60
20	32
21	61
22	33
23	62
24	34
25	63
26	35
27	15
28	17
29	18
30	41
31	42
32	74
33	75
34	43
35	44
36	21
37	22
38	23
39	48
40	49
41	83
42	84
43	50
44	51
45	26
46	27
47	11
48	30
49	59
50	96
51	143
52	97
53	144
54	98
55	145
56	99
57	146
58	100
59	147
60	101
61	148
62	102
63	64
64	36
65	16