A323809 - cp's OEIS frontend

A323809 Squares visited by a knight on a spirally numbered board, moving always to the lowest available unvisited square, or one step back if no unvisited square is available.

n	a(n)
0	0
1	9
2	2
3	5
4	8
5	3
6	6
7	1
8	4
9	7
10	10
11	13
12	28
13	31
14	14
15	11
16	26
17	23
18	44
19	19
20	22
21	43
22	40
23	17
24	34
25	37
26	18
27	15
28	32
29	29
30	52
31	25
32	46
33	21
34	42
35	69
36	20
37	39
38	16
39	33
40	12
41	27
42	24
43	45
44	74
45	41
46	68
47	103
48	36
49	61
50	94
51	57
52	54
53	85
54	50
55	47
56	76
57	113
58	72
59	107
60	150
61	67
62	102
63	63
64	66
65	35
66	38
67	65
68	62

[0, 9, 2, 5, 8, 3, 6, 1, 4, 7, 10, 13, 28, 31, 14, 11, 26, 23, 44, 19, 22, 43, 40, 17, 34, 37, 18, 15, 32, 29, 52, 25, 46, 21, 42, 69, 20, 39, 16, 33, 12, 27, 24, 45, 74, 41, 68, 103, 36, 61, 94, 57, 54, 85, 50, 47, 76, 113, 72, 107, 150, 67, 102, 63, 66, 35, 38, 65, 62]

cp's OEIS Frontend

A323809 Squares visited by a knight on a spirally numbered board, moving always to the lowest available unvisited square, or one step back if no unvisited square is available.

Table of values

List of values

n	a(n)
0	0
1	9
2	2
3	5
4	8
5	3
6	6
7	1
8	4
9	7
10	10
11	13
12	28
13	31
14	14
15	11
16	26
17	23
18	44
19	19
20	22
21	43
22	40
23	17
24	34
25	37
26	18
27	15
28	32
29	29
30	52
31	25
32	46
33	21
34	42
35	69
36	20
37	39
38	16
39	33
40	12
41	27
42	24
43	45
44	74
45	41
46	68
47	103
48	36
49	61
50	94
51	57
52	54
53	85
54	50
55	47
56	76
57	113
58	72
59	107
60	150
61	67
62	102
63	63
64	66
65	35
66	38
67	65
68	62

n	a(n)
0	0
1	9
2	2
3	5
4	8
5	3
6	6
7	1
8	4
9	7
10	10
11	13
12	28
13	31
14	14
15	11
16	26
17	23
18	44
19	19
20	22
21	43
22	40
23	17
24	34
25	37
26	18
27	15
28	32
29	29
30	52
31	25
32	46
33	21
34	42
35	69
36	20
37	39
38	16
39	33
40	12
41	27
42	24
43	45
44	74
45	41
46	68
47	103
48	36
49	61
50	94
51	57
52	54
53	85
54	50
55	47
56	76
57	113
58	72
59	107
60	150
61	67
62	102
63	63
64	66
65	35
66	38
67	65
68	62

n	a(n)
0	0
1	9
2	2
3	5
4	8
5	3
6	6
7	1
8	4
9	7
10	10
11	13
12	28
13	31
14	14
15	11
16	26
17	23
18	44
19	19
20	22
21	43
22	40
23	17
24	34
25	37
26	18
27	15
28	32
29	29
30	52
31	25
32	46
33	21
34	42
35	69
36	20
37	39
38	16
39	33
40	12
41	27
42	24
43	45
44	74
45	41
46	68
47	103
48	36
49	61
50	94
51	57
52	54
53	85
54	50
55	47
56	76
57	113
58	72
59	107
60	150
61	67
62	102
63	63
64	66
65	35
66	38
67	65
68	62