A316995 - cp's OEIS frontend

A316995 Sequence of distinct signed integers such that a(1) = 0 and for any n > 0, a(n+1) is of the form a(n) + (-2)^k (where k >= 0) and has the smallest possible absolute value (in case of a tie, minimize k).

n	a(n)
1	0
2	1
3	-1
4	-3
5	-2
6	2
7	3
8	4
9	-4
10	-6
11	-5
12	-7
13	-9
14	7
15	5
16	6
17	10
18	8
19	9
20	13
21	11
22	12
23	16
24	14
25	15
26	-17
27	-13
28	-12
29	-8
30	-10
31	-18
32	-14
33	-16
34	-15
35	-11
36	-19
37	-21
38	-20
39	-22
40	-24
41	-23
42	-25
43	-27
44	-26
45	-28
46	-30
47	-29
48	-31
49	-33
50	31
51	23
52	21
53	19
54	17
55	18
56	22
57	20
58	24
59	25
60	26
61	27
62	28

[0, 1, -1, -3, -2, 2, 3, 4, -4, -6, -5, -7, -9, 7, 5, 6, 10, 8, 9, 13, 11, 12, 16, 14, 15, -17, -13, -12, -8, -10, -18, -14, -16, -15, -11, -19, -21, -20, -22, -24, -23, -25, -27, -26, -28, -30, -29, -31, -33, 31, 23, 21, 19, 17, 18, 22, 20, 24, 25, 26, 27, 28]

cp's OEIS Frontend

A316995 Sequence of distinct signed integers such that a(1) = 0 and for any n > 0, a(n+1) is of the form a(n) + (-2)^k (where k >= 0) and has the smallest possible absolute value (in case of a tie, minimize k).

Table of values

List of values

n	a(n)
1	0
2	1
3	-1
4	-3
5	-2
6	2
7	3
8	4
9	-4
10	-6
11	-5
12	-7
13	-9
14	7
15	5
16	6
17	10
18	8
19	9
20	13
21	11
22	12
23	16
24	14
25	15
26	-17
27	-13
28	-12
29	-8
30	-10
31	-18
32	-14
33	-16
34	-15
35	-11
36	-19
37	-21
38	-20
39	-22
40	-24
41	-23
42	-25
43	-27
44	-26
45	-28
46	-30
47	-29
48	-31
49	-33
50	31
51	23
52	21
53	19
54	17
55	18
56	22
57	20
58	24
59	25
60	26
61	27
62	28

n	a(n)
1	0
2	1
3	-1
4	-3
5	-2
6	2
7	3
8	4
9	-4
10	-6
11	-5
12	-7
13	-9
14	7
15	5
16	6
17	10
18	8
19	9
20	13
21	11
22	12
23	16
24	14
25	15
26	-17
27	-13
28	-12
29	-8
30	-10
31	-18
32	-14
33	-16
34	-15
35	-11
36	-19
37	-21
38	-20
39	-22
40	-24
41	-23
42	-25
43	-27
44	-26
45	-28
46	-30
47	-29
48	-31
49	-33
50	31
51	23
52	21
53	19
54	17
55	18
56	22
57	20
58	24
59	25
60	26
61	27
62	28

n	a(n)
1	0
2	1
3	-1
4	-3
5	-2
6	2
7	3
8	4
9	-4
10	-6
11	-5
12	-7
13	-9
14	7
15	5
16	6
17	10
18	8
19	9
20	13
21	11
22	12
23	16
24	14
25	15
26	-17
27	-13
28	-12
29	-8
30	-10
31	-18
32	-14
33	-16
34	-15
35	-11
36	-19
37	-21
38	-20
39	-22
40	-24
41	-23
42	-25
43	-27
44	-26
45	-28
46	-30
47	-29
48	-31
49	-33
50	31
51	23
52	21
53	19
54	17
55	18
56	22
57	20
58	24
59	25
60	26
61	27
62	28