A361207 - cp's OEIS frontend

A361207 An infinite 2d grid is filled with the positive integers by placing them clockwise around the lowest number with open neighbors. a(n) is then the n-th term when the grid is read as a clockwise square spiral.

n	a(n)
1	1
2	2
3	7
4	3
5	10
6	4
7	12
8	5
9	8
10	16
11	6
12	15
13	29
14	17
15	9
16	20
17	35
18	21
19	11
20	23
21	39
22	24
23	13
24	18
25	30
26	46
27	28
28	14
29	27
30	45
31	67
32	47
33	31
34	19
35	34
36	53
37	76
38	54
39	36
40	22
41	38
42	58
43	82
44	59
45	40
46	25
47	32
48	48
49	68
50	92
51	66
52	44
53	26
54	43
55	65
56	91
57	121
58	93
59	69
60	49
61	33
62	52
63	75
64	102
65	133
66	103
67	77

[1, 2, 7, 3, 10, 4, 12, 5, 8, 16, 6, 15, 29, 17, 9, 20, 35, 21, 11, 23, 39, 24, 13, 18, 30, 46, 28, 14, 27, 45, 67, 47, 31, 19, 34, 53, 76, 54, 36, 22, 38, 58, 82, 59, 40, 25, 32, 48, 68, 92, 66, 44, 26, 43, 65, 91, 121, 93, 69, 49, 33, 52, 75, 102, 133, 103, 77]

cp's OEIS Frontend

A361207 An infinite 2d grid is filled with the positive integers by placing them clockwise around the lowest number with open neighbors. a(n) is then the n-th term when the grid is read as a clockwise square spiral.

Table of values

List of values

n	a(n)
1	1
2	2
3	7
4	3
5	10
6	4
7	12
8	5
9	8
10	16
11	6
12	15
13	29
14	17
15	9
16	20
17	35
18	21
19	11
20	23
21	39
22	24
23	13
24	18
25	30
26	46
27	28
28	14
29	27
30	45
31	67
32	47
33	31
34	19
35	34
36	53
37	76
38	54
39	36
40	22
41	38
42	58
43	82
44	59
45	40
46	25
47	32
48	48
49	68
50	92
51	66
52	44
53	26
54	43
55	65
56	91
57	121
58	93
59	69
60	49
61	33
62	52
63	75
64	102
65	133
66	103
67	77

n	a(n)
1	1
2	2
3	7
4	3
5	10
6	4
7	12
8	5
9	8
10	16
11	6
12	15
13	29
14	17
15	9
16	20
17	35
18	21
19	11
20	23
21	39
22	24
23	13
24	18
25	30
26	46
27	28
28	14
29	27
30	45
31	67
32	47
33	31
34	19
35	34
36	53
37	76
38	54
39	36
40	22
41	38
42	58
43	82
44	59
45	40
46	25
47	32
48	48
49	68
50	92
51	66
52	44
53	26
54	43
55	65
56	91
57	121
58	93
59	69
60	49
61	33
62	52
63	75
64	102
65	133
66	103
67	77

n	a(n)
1	1
2	2
3	7
4	3
5	10
6	4
7	12
8	5
9	8
10	16
11	6
12	15
13	29
14	17
15	9
16	20
17	35
18	21
19	11
20	23
21	39
22	24
23	13
24	18
25	30
26	46
27	28
28	14
29	27
30	45
31	67
32	47
33	31
34	19
35	34
36	53
37	76
38	54
39	36
40	22
41	38
42	58
43	82
44	59
45	40
46	25
47	32
48	48
49	68
50	92
51	66
52	44
53	26
54	43
55	65
56	91
57	121
58	93
59	69
60	49
61	33
62	52
63	75
64	102
65	133
66	103
67	77