A328728 - cp's OEIS frontend

A328728 a(n) = Sum_{k = 0..w and t_k > 0} (-1)^t_k * 2^k, where Sum_{k = 0..w} t_k * 3^k is the ternary representation of A328727(n).

n	a(n)
1	0
2	-1
3	1
4	-2
5	2
6	-4
7	-5
8	-3
9	4
10	3
11	5
12	-8
13	-9
14	-7
15	-10
16	-6
17	8
18	7
19	9
20	6
21	10
22	-16
23	-17
24	-15
25	-18
26	-14
27	-20
28	-21
29	-19
30	-12
31	-13
32	-11
33	16
34	15
35	17
36	14
37	18
38	12
39	11
40	13
41	20
42	19
43	21
44	-32
45	-33
46	-31
47	-34
48	-30
49	-36
50	-37
51	-35
52	-28
53	-29
54	-27
55	-40
56	-41
57	-39
58	-42
59	-38
60	-24

[0, -1, 1, -2, 2, -4, -5, -3, 4, 3, 5, -8, -9, -7, -10, -6, 8, 7, 9, 6, 10, -16, -17, -15, -18, -14, -20, -21, -19, -12, -13, -11, 16, 15, 17, 14, 18, 12, 11, 13, 20, 19, 21, -32, -33, -31, -34, -30, -36, -37, -35, -28, -29, -27, -40, -41, -39, -42, -38, -24]

cp's OEIS Frontend

A328728 a(n) = Sum_{k = 0..w and t_k > 0} (-1)^t_k * 2^k, where Sum_{k = 0..w} t_k * 3^k is the ternary representation of A328727(n).

Table of values

List of values

n	a(n)
1	0
2	-1
3	1
4	-2
5	2
6	-4
7	-5
8	-3
9	4
10	3
11	5
12	-8
13	-9
14	-7
15	-10
16	-6
17	8
18	7
19	9
20	6
21	10
22	-16
23	-17
24	-15
25	-18
26	-14
27	-20
28	-21
29	-19
30	-12
31	-13
32	-11
33	16
34	15
35	17
36	14
37	18
38	12
39	11
40	13
41	20
42	19
43	21
44	-32
45	-33
46	-31
47	-34
48	-30
49	-36
50	-37
51	-35
52	-28
53	-29
54	-27
55	-40
56	-41
57	-39
58	-42
59	-38
60	-24

n	a(n)
1	0
2	-1
3	1
4	-2
5	2
6	-4
7	-5
8	-3
9	4
10	3
11	5
12	-8
13	-9
14	-7
15	-10
16	-6
17	8
18	7
19	9
20	6
21	10
22	-16
23	-17
24	-15
25	-18
26	-14
27	-20
28	-21
29	-19
30	-12
31	-13
32	-11
33	16
34	15
35	17
36	14
37	18
38	12
39	11
40	13
41	20
42	19
43	21
44	-32
45	-33
46	-31
47	-34
48	-30
49	-36
50	-37
51	-35
52	-28
53	-29
54	-27
55	-40
56	-41
57	-39
58	-42
59	-38
60	-24

n	a(n)
1	0
2	-1
3	1
4	-2
5	2
6	-4
7	-5
8	-3
9	4
10	3
11	5
12	-8
13	-9
14	-7
15	-10
16	-6
17	8
18	7
19	9
20	6
21	10
22	-16
23	-17
24	-15
25	-18
26	-14
27	-20
28	-21
29	-19
30	-12
31	-13
32	-11
33	16
34	15
35	17
36	14
37	18
38	12
39	11
40	13
41	20
42	19
43	21
44	-32
45	-33
46	-31
47	-34
48	-30
49	-36
50	-37
51	-35
52	-28
53	-29
54	-27
55	-40
56	-41
57	-39
58	-42
59	-38
60	-24