A355679 - cp's OEIS frontend

A355679 For any nonnegative number n with primorial base expansion Sum_{k >= 0} d_k * A002110(k), a(n) = Sum_{k >= 0} d_k * A002110(k) * (-1)^(Sum_{i < k} sign(d_i)).

n	a(n)
0	0
1	1
2	2
3	-1
4	4
5	-3
6	6
7	-5
8	-4
9	5
10	-2
11	3
12	12
13	-11
14	-10
15	11
16	-8
17	9
18	18
19	-17
20	-16
21	17
22	-14
23	15
24	24
25	-23
26	-22
27	23
28	-20
29	21
30	30
31	-29
32	-28
33	29
34	-26
35	27
36	-24
37	25
38	26
39	-25
40	28
41	-27
42	-18
43	19
44	20
45	-19
46	22
47	-21
48	-12
49	13
50	14
51	-13
52	16
53	-15
54	-6
55	7
56	8
57	-7
58	10
59	-9
60	60
61	-59

[0, 1, 2, -1, 4, -3, 6, -5, -4, 5, -2, 3, 12, -11, -10, 11, -8, 9, 18, -17, -16, 17, -14, 15, 24, -23, -22, 23, -20, 21, 30, -29, -28, 29, -26, 27, -24, 25, 26, -25, 28, -27, -18, 19, 20, -19, 22, -21, -12, 13, 14, -13, 16, -15, -6, 7, 8, -7, 10, -9, 60, -59]

cp's OEIS Frontend

A355679 For any nonnegative number n with primorial base expansion Sum_{k >= 0} d_k * A002110(k), a(n) = Sum_{k >= 0} d_k * A002110(k) * (-1)^(Sum_{i < k} sign(d_i)).

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	-1
4	4
5	-3
6	6
7	-5
8	-4
9	5
10	-2
11	3
12	12
13	-11
14	-10
15	11
16	-8
17	9
18	18
19	-17
20	-16
21	17
22	-14
23	15
24	24
25	-23
26	-22
27	23
28	-20
29	21
30	30
31	-29
32	-28
33	29
34	-26
35	27
36	-24
37	25
38	26
39	-25
40	28
41	-27
42	-18
43	19
44	20
45	-19
46	22
47	-21
48	-12
49	13
50	14
51	-13
52	16
53	-15
54	-6
55	7
56	8
57	-7
58	10
59	-9
60	60
61	-59

n	a(n)
0	0
1	1
2	2
3	-1
4	4
5	-3
6	6
7	-5
8	-4
9	5
10	-2
11	3
12	12
13	-11
14	-10
15	11
16	-8
17	9
18	18
19	-17
20	-16
21	17
22	-14
23	15
24	24
25	-23
26	-22
27	23
28	-20
29	21
30	30
31	-29
32	-28
33	29
34	-26
35	27
36	-24
37	25
38	26
39	-25
40	28
41	-27
42	-18
43	19
44	20
45	-19
46	22
47	-21
48	-12
49	13
50	14
51	-13
52	16
53	-15
54	-6
55	7
56	8
57	-7
58	10
59	-9
60	60
61	-59

n	a(n)
0	0
1	1
2	2
3	-1
4	4
5	-3
6	6
7	-5
8	-4
9	5
10	-2
11	3
12	12
13	-11
14	-10
15	11
16	-8
17	9
18	18
19	-17
20	-16
21	17
22	-14
23	15
24	24
25	-23
26	-22
27	23
28	-20
29	21
30	30
31	-29
32	-28
33	29
34	-26
35	27
36	-24
37	25
38	26
39	-25
40	28
41	-27
42	-18
43	19
44	20
45	-19
46	22
47	-21
48	-12
49	13
50	14
51	-13
52	16
53	-15
54	-6
55	7
56	8
57	-7
58	10
59	-9
60	60
61	-59