A033990 - cp's OEIS frontend

A033990 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 y-axis.

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

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

cp's OEIS Frontend

A033990 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 y-axis.

Table of values

List of values

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

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

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