A364130 - cp's OEIS frontend

A364130 An infinite 2d grid is filled with the positive integers by placing them clockwise in the narrow von Neumann's neighborhood of square s, 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	8
4	3
5	15
6	4
7	22
8	5
9	10
10	37
11	6
12	31
13	32
14	9
15	12
16	84
17	85
18	16
19	18
20	154
21	155
22	23
23	26
24	11
25	38
26	58
27	57
28	7
29	50
30	51
31	52
32	33
33	64
34	13
35	96
36	97
37	98
38	86
39	17
40	19
41	172
42	173
43	174
44	156
45	24
46	27
47	73
48	39
49	59
50	431
51	430
52	429
53	43
54	386
55	387
56	388
57	389
58	53
59	34
60	65
61	14
62	123
63	124

[1, 2, 8, 3, 15, 4, 22, 5, 10, 37, 6, 31, 32, 9, 12, 84, 85, 16, 18, 154, 155, 23, 26, 11, 38, 58, 57, 7, 50, 51, 52, 33, 64, 13, 96, 97, 98, 86, 17, 19, 172, 173, 174, 156, 24, 27, 73, 39, 59, 431, 430, 429, 43, 386, 387, 388, 389, 53, 34, 65, 14, 123, 124]

cp's OEIS Frontend

A364130 An infinite 2d grid is filled with the positive integers by placing them clockwise in the narrow von Neumann's neighborhood of square s, 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	8
4	3
5	15
6	4
7	22
8	5
9	10
10	37
11	6
12	31
13	32
14	9
15	12
16	84
17	85
18	16
19	18
20	154
21	155
22	23
23	26
24	11
25	38
26	58
27	57
28	7
29	50
30	51
31	52
32	33
33	64
34	13
35	96
36	97
37	98
38	86
39	17
40	19
41	172
42	173
43	174
44	156
45	24
46	27
47	73
48	39
49	59
50	431
51	430
52	429
53	43
54	386
55	387
56	388
57	389
58	53
59	34
60	65
61	14
62	123
63	124

n	a(n)
1	1
2	2
3	8
4	3
5	15
6	4
7	22
8	5
9	10
10	37
11	6
12	31
13	32
14	9
15	12
16	84
17	85
18	16
19	18
20	154
21	155
22	23
23	26
24	11
25	38
26	58
27	57
28	7
29	50
30	51
31	52
32	33
33	64
34	13
35	96
36	97
37	98
38	86
39	17
40	19
41	172
42	173
43	174
44	156
45	24
46	27
47	73
48	39
49	59
50	431
51	430
52	429
53	43
54	386
55	387
56	388
57	389
58	53
59	34
60	65
61	14
62	123
63	124

n	a(n)
1	1
2	2
3	8
4	3
5	15
6	4
7	22
8	5
9	10
10	37
11	6
12	31
13	32
14	9
15	12
16	84
17	85
18	16
19	18
20	154
21	155
22	23
23	26
24	11
25	38
26	58
27	57
28	7
29	50
30	51
31	52
32	33
33	64
34	13
35	96
36	97
37	98
38	86
39	17
40	19
41	172
42	173
43	174
44	156
45	24
46	27
47	73
48	39
49	59
50	431
51	430
52	429
53	43
54	386
55	387
56	388
57	389
58	53
59	34
60	65
61	14
62	123
63	124