A330008 - cp's OEIS frontend

A330008 Squares visited by a knight moving on a square-spiral numbered board where the knight moves to an unvisited square with the lowest prime spiral number, or lowest composite number if no primes are available.

n	a(n)
1	1
2	10
3	3
4	6
5	17
6	4
7	7
8	2
9	5
10	8
11	11
12	14
13	29
14	32
15	61
16	16
17	19
18	22
19	41
20	18
21	37
22	62
23	139
24	60
25	13
26	28
27	9
28	12
29	31
30	54
31	89
32	30
33	53
34	26
35	47
36	76
37	23
38	20
39	43
40	70
41	109
42	42
43	73
44	44
45	71
46	40
47	67
48	36
49	97
50	34
51	59
52	56
53	131
54	88
55	127
56	52
57	83
58	80
59	167
60	82
61	173
62	84
63	27
64	24
65	79
66	46
67	21
68	72
69	107

[1, 10, 3, 6, 17, 4, 7, 2, 5, 8, 11, 14, 29, 32, 61, 16, 19, 22, 41, 18, 37, 62, 139, 60, 13, 28, 9, 12, 31, 54, 89, 30, 53, 26, 47, 76, 23, 20, 43, 70, 109, 42, 73, 44, 71, 40, 67, 36, 97, 34, 59, 56, 131, 88, 127, 52, 83, 80, 167, 82, 173, 84, 27, 24, 79, 46, 21, 72, 107]

cp's OEIS Frontend

A330008 Squares visited by a knight moving on a square-spiral numbered board where the knight moves to an unvisited square with the lowest prime spiral number, or lowest composite number if no primes are available.

Table of values

List of values

n	a(n)
1	1
2	10
3	3
4	6
5	17
6	4
7	7
8	2
9	5
10	8
11	11
12	14
13	29
14	32
15	61
16	16
17	19
18	22
19	41
20	18
21	37
22	62
23	139
24	60
25	13
26	28
27	9
28	12
29	31
30	54
31	89
32	30
33	53
34	26
35	47
36	76
37	23
38	20
39	43
40	70
41	109
42	42
43	73
44	44
45	71
46	40
47	67
48	36
49	97
50	34
51	59
52	56
53	131
54	88
55	127
56	52
57	83
58	80
59	167
60	82
61	173
62	84
63	27
64	24
65	79
66	46
67	21
68	72
69	107

n	a(n)
1	1
2	10
3	3
4	6
5	17
6	4
7	7
8	2
9	5
10	8
11	11
12	14
13	29
14	32
15	61
16	16
17	19
18	22
19	41
20	18
21	37
22	62
23	139
24	60
25	13
26	28
27	9
28	12
29	31
30	54
31	89
32	30
33	53
34	26
35	47
36	76
37	23
38	20
39	43
40	70
41	109
42	42
43	73
44	44
45	71
46	40
47	67
48	36
49	97
50	34
51	59
52	56
53	131
54	88
55	127
56	52
57	83
58	80
59	167
60	82
61	173
62	84
63	27
64	24
65	79
66	46
67	21
68	72
69	107

n	a(n)
1	1
2	10
3	3
4	6
5	17
6	4
7	7
8	2
9	5
10	8
11	11
12	14
13	29
14	32
15	61
16	16
17	19
18	22
19	41
20	18
21	37
22	62
23	139
24	60
25	13
26	28
27	9
28	12
29	31
30	54
31	89
32	30
33	53
34	26
35	47
36	76
37	23
38	20
39	43
40	70
41	109
42	42
43	73
44	44
45	71
46	40
47	67
48	36
49	97
50	34
51	59
52	56
53	131
54	88
55	127
56	52
57	83
58	80
59	167
60	82
61	173
62	84
63	27
64	24
65	79
66	46
67	21
68	72
69	107