A033989 - cp's OEIS frontend

A033989 Write 0,1,2,... in a clockwise spiral on a square lattice, writing each digit at a separate lattice point, starting with 0 at the origin and 1 at x=0, y=-1; sequence gives the numbers on the negative x-axis.

n	a(n)
0	0
1	3
2	1
3	1
4	3
5	2
6	7
7	9
8	1
9	1
10	6
11	9
12	4
13	7
14	9
15	1
16	2
17	1
18	2
19	1
20	6
21	7
22	4
23	3
24	6
25	1
26	2
27	9
28	5
29	1
30	1
31	0
32	9
33	3
34	1
35	3
36	6
37	6
38	1
39	8
40	6
41	9
42	2
43	5
44	0
45	2
46	2
47	4
48	6
49	6
50	2
51	5
52	6
53	0
54	3
55	8
56	9
57	5
58	3
59	3
60	6
61	9
62	4
63	0
64	5
65	4
66	4
67	9
68	8
69	0
70	5
71	0
72	4
73	5
74	5
75	3
76	3
77	1
78	6
79	8
80	5
81	8
82	6
83	5
84	1
85	4
86	7
87	4
88	9
89	1
90	8
91	5
92	1
93	9
94	9
95	8
96	6
97	6
98	9
99	1
100	1
101	6
102	4
103	8
104	1

[0, 3, 1, 1, 3, 2, 7, 9, 1, 1, 6, 9, 4, 7, 9, 1, 2, 1, 2, 1, 6, 7, 4, 3, 6, 1, 2, 9, 5, 1, 1, 0, 9, 3, 1, 3, 6, 6, 1, 8, 6, 9, 2, 5, 0, 2, 2, 4, 6, 6, 2, 5, 6, 0, 3, 8, 9, 5, 3, 3, 6, 9, 4, 0, 5, 4, 4, 9, 8, 0, 5, 0, 4, 5, 5, 3, 3, 1, 6, 8, 5, 8, 6, 5, 1, 4, 7, 4, 9, 1, 8, 5, 1, 9, 9, 8, 6, 6, 9, 1, 1, 6, 4, 8, 1]

cp's OEIS Frontend

A033989 Write 0,1,2,... in a clockwise spiral on a square lattice, writing each digit at a separate lattice point, starting with 0 at the origin and 1 at x=0, y=-1; sequence gives the numbers on the negative x-axis.

Table of values

List of values

n	a(n)
0	0
1	3
2	1
3	1
4	3
5	2
6	7
7	9
8	1
9	1
10	6
11	9
12	4
13	7
14	9
15	1
16	2
17	1
18	2
19	1
20	6
21	7
22	4
23	3
24	6
25	1
26	2
27	9
28	5
29	1
30	1
31	0
32	9
33	3
34	1
35	3
36	6
37	6
38	1
39	8
40	6
41	9
42	2
43	5
44	0
45	2
46	2
47	4
48	6
49	6
50	2
51	5
52	6
53	0
54	3
55	8
56	9
57	5
58	3
59	3
60	6
61	9
62	4
63	0
64	5
65	4
66	4
67	9
68	8
69	0
70	5
71	0
72	4
73	5
74	5
75	3
76	3
77	1
78	6
79	8
80	5
81	8
82	6
83	5
84	1
85	4
86	7
87	4
88	9
89	1
90	8
91	5
92	1
93	9
94	9
95	8
96	6
97	6
98	9
99	1
100	1
101	6
102	4
103	8
104	1

n	a(n)
0	0
1	3
2	1
3	1
4	3
5	2
6	7
7	9
8	1
9	1
10	6
11	9
12	4
13	7
14	9
15	1
16	2
17	1
18	2
19	1
20	6
21	7
22	4
23	3
24	6
25	1
26	2
27	9
28	5
29	1
30	1
31	0
32	9
33	3
34	1
35	3
36	6
37	6
38	1
39	8
40	6
41	9
42	2
43	5
44	0
45	2
46	2
47	4
48	6
49	6
50	2
51	5
52	6
53	0
54	3
55	8
56	9
57	5
58	3
59	3
60	6
61	9
62	4
63	0
64	5
65	4
66	4
67	9
68	8
69	0
70	5
71	0
72	4
73	5
74	5
75	3
76	3
77	1
78	6
79	8
80	5
81	8
82	6
83	5
84	1
85	4
86	7
87	4
88	9
89	1
90	8
91	5
92	1
93	9
94	9
95	8
96	6
97	6
98	9
99	1
100	1
101	6
102	4
103	8
104	1

n	a(n)
0	0
1	3
2	1
3	1
4	3
5	2
6	7
7	9
8	1
9	1
10	6
11	9
12	4
13	7
14	9
15	1
16	2
17	1
18	2
19	1
20	6
21	7
22	4
23	3
24	6
25	1
26	2
27	9
28	5
29	1
30	1
31	0
32	9
33	3
34	1
35	3
36	6
37	6
38	1
39	8
40	6
41	9
42	2
43	5
44	0
45	2
46	2
47	4
48	6
49	6
50	2
51	5
52	6
53	0
54	3
55	8
56	9
57	5
58	3
59	3
60	6
61	9
62	4
63	0
64	5
65	4
66	4
67	9
68	8
69	0
70	5
71	0
72	4
73	5
74	5
75	3
76	3
77	1
78	6
79	8
80	5
81	8
82	6
83	5
84	1
85	4
86	7
87	4
88	9
89	1
90	8
91	5
92	1
93	9
94	9
95	8
96	6
97	6
98	9
99	1
100	1
101	6
102	4
103	8
104	1