A348917 - cp's OEIS frontend

A348917 a(n) is the "w" part of f(n) = Sum_{k >= 0} g(d_k) * (4 + w)^k where g(0) = 0 and g(1 + u + 2v) = (2 + w)^u (1 + w)^v for any u = 0..1 and v = 0..5, Sum_{k >= 0} d_k * 13^k is the base-13 representation of n and w = -1/2 + sqrt(-3)/2 is a primitive cube root of unity; sequence A348916 gives "real" parts.

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

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

cp's OEIS Frontend

Table of values

List of values

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

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

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