A332767 - cp's OEIS frontend

A332767 The squares visited on the 2D square (Ulam) spiral when starting at square 1 and then stepping to the closest unvisited square which contains a composite number. If two or more squares are the same distance from the current square then the one with the smallest composite number is chosen.

n	a(n)
1	1
2	4
3	15
4	14
5	33
6	32
7	30
8	55
9	54
10	87
11	86
12	85
13	52
14	27
15	10
16	9
17	8
18	6
19	18
20	39
21	38
22	36
23	35
24	16
25	34
26	60
27	95
28	94
29	93
30	58
31	57
32	56
33	88
34	129
35	128
36	177
37	176
38	175
39	126
40	125
41	84
42	51
43	26
44	25
45	24
46	46
47	45
48	22
49	21
50	20
51	40
52	69

[1, 4, 15, 14, 33, 32, 30, 55, 54, 87, 86, 85, 52, 27, 10, 9, 8, 6, 18, 39, 38, 36, 35, 16, 34, 60, 95, 94, 93, 58, 57, 56, 88, 129, 128, 177, 176, 175, 126, 125, 84, 51, 26, 25, 24, 46, 45, 22, 21, 20, 40, 69]

cp's OEIS Frontend

A332767 The squares visited on the 2D square (Ulam) spiral when starting at square 1 and then stepping to the closest unvisited square which contains a composite number. If two or more squares are the same distance from the current square then the one with the smallest composite number is chosen.

Table of values

List of values

n	a(n)
1	1
2	4
3	15
4	14
5	33
6	32
7	30
8	55
9	54
10	87
11	86
12	85
13	52
14	27
15	10
16	9
17	8
18	6
19	18
20	39
21	38
22	36
23	35
24	16
25	34
26	60
27	95
28	94
29	93
30	58
31	57
32	56
33	88
34	129
35	128
36	177
37	176
38	175
39	126
40	125
41	84
42	51
43	26
44	25
45	24
46	46
47	45
48	22
49	21
50	20
51	40
52	69

n	a(n)
1	1
2	4
3	15
4	14
5	33
6	32
7	30
8	55
9	54
10	87
11	86
12	85
13	52
14	27
15	10
16	9
17	8
18	6
19	18
20	39
21	38
22	36
23	35
24	16
25	34
26	60
27	95
28	94
29	93
30	58
31	57
32	56
33	88
34	129
35	128
36	177
37	176
38	175
39	126
40	125
41	84
42	51
43	26
44	25
45	24
46	46
47	45
48	22
49	21
50	20
51	40
52	69

n	a(n)
1	1
2	4
3	15
4	14
5	33
6	32
7	30
8	55
9	54
10	87
11	86
12	85
13	52
14	27
15	10
16	9
17	8
18	6
19	18
20	39
21	38
22	36
23	35
24	16
25	34
26	60
27	95
28	94
29	93
30	58
31	57
32	56
33	88
34	129
35	128
36	177
37	176
38	175
39	126
40	125
41	84
42	51
43	26
44	25
45	24
46	46
47	45
48	22
49	21
50	20
51	40
52	69