A308884 - cp's OEIS frontend

A308884 Follow along the squares in the square spiral (as in A274641); in each square write the smallest nonnegative number that a knight placed at that square cannot see.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	1
16	2
17	3
18	3
19	2
20	0
21	1
22	3
23	2
24	1
25	0
26	3
27	3
28	3
29	2
30	0
31	1
32	3
33	3
34	1
35	0
36	0
37	0
38	3
39	3
40	0
41	0
42	0
43	2
44	1
45	3
46	3
47	0
48	0
49	0
50	2
51	2
52	3
53	2
54	0
55	0
56	0
57	2
58	1
59	3
60	3
61	1
62	2
63	0
64	1
65	0
66	1
67	1
68	1
69	1
70	0
71	1
72	1
73	2
74	2
75	1
76	3
77	2
78	1
79	0
80	1
81	1
82	1
83	2
84	1
85	1
86	1
87	1
88	0
89	1
90	1
91	2
92	2
93	1

[0, 0, 0, 0, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 2, 3, 3, 2, 0, 1, 3, 2, 1, 0, 3, 3, 3, 2, 0, 1, 3, 3, 1, 0, 0, 0, 3, 3, 0, 0, 0, 2, 1, 3, 3, 0, 0, 0, 2, 2, 3, 2, 0, 0, 0, 2, 1, 3, 3, 1, 2, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 2, 2, 1, 3, 2, 1, 0, 1, 1, 1, 2, 1, 1, 1, 1, 0, 1, 1, 2, 2, 1]

cp's OEIS Frontend

A308884 Follow along the squares in the square spiral (as in A274641); in each square write the smallest nonnegative number that a knight placed at that square cannot see.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	1
16	2
17	3
18	3
19	2
20	0
21	1
22	3
23	2
24	1
25	0
26	3
27	3
28	3
29	2
30	0
31	1
32	3
33	3
34	1
35	0
36	0
37	0
38	3
39	3
40	0
41	0
42	0
43	2
44	1
45	3
46	3
47	0
48	0
49	0
50	2
51	2
52	3
53	2
54	0
55	0
56	0
57	2
58	1
59	3
60	3
61	1
62	2
63	0
64	1
65	0
66	1
67	1
68	1
69	1
70	0
71	1
72	1
73	2
74	2
75	1
76	3
77	2
78	1
79	0
80	1
81	1
82	1
83	2
84	1
85	1
86	1
87	1
88	0
89	1
90	1
91	2
92	2
93	1

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	1
16	2
17	3
18	3
19	2
20	0
21	1
22	3
23	2
24	1
25	0
26	3
27	3
28	3
29	2
30	0
31	1
32	3
33	3
34	1
35	0
36	0
37	0
38	3
39	3
40	0
41	0
42	0
43	2
44	1
45	3
46	3
47	0
48	0
49	0
50	2
51	2
52	3
53	2
54	0
55	0
56	0
57	2
58	1
59	3
60	3
61	1
62	2
63	0
64	1
65	0
66	1
67	1
68	1
69	1
70	0
71	1
72	1
73	2
74	2
75	1
76	3
77	2
78	1
79	0
80	1
81	1
82	1
83	2
84	1
85	1
86	1
87	1
88	0
89	1
90	1
91	2
92	2
93	1

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	1
16	2
17	3
18	3
19	2
20	0
21	1
22	3
23	2
24	1
25	0
26	3
27	3
28	3
29	2
30	0
31	1
32	3
33	3
34	1
35	0
36	0
37	0
38	3
39	3
40	0
41	0
42	0
43	2
44	1
45	3
46	3
47	0
48	0
49	0
50	2
51	2
52	3
53	2
54	0
55	0
56	0
57	2
58	1
59	3
60	3
61	1
62	2
63	0
64	1
65	0
66	1
67	1
68	1
69	1
70	0
71	1
72	1
73	2
74	2
75	1
76	3
77	2
78	1
79	0
80	1
81	1
82	1
83	2
84	1
85	1
86	1
87	1
88	0
89	1
90	1
91	2
92	2
93	1