A362496 - cp's OEIS frontend

A362496 Square array A(n, k), n, k >= 0, read by upwards antidiagonals; if Newton's method applied to the complex function f(z) = z^3 - 1 and starting from n + ki reaches or converges to exp(2riPi/3) for some r in 0..2, then A(n, k) = r, otherwise A(n, k) = -1 (where i denotes the imaginary unit).

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

[-1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 2, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 1, 1, 1]

cp's OEIS Frontend

A362496 Square array A(n, k), n, k >= 0, read by upwards antidiagonals; if Newton's method applied to the complex function f(z) = z^3 - 1 and starting from n + ki reaches or converges to exp(2riPi/3) for some r in 0..2, then A(n, k) = r, otherwise A(n, k) = -1 (where i denotes the imaginary unit).

Table of values

List of values

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

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

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