A309217 - cp's OEIS frontend

A309217 The sequence is {a(n), n>=0}, the concatenation of the binary expansions of the absolute values |a(n)| is {b(n), n>=0}; start with a(0)=0; thereafter a(n) = a(n-1)+n if b(n-1)=0, otherwise a(n) = a(n-1)-n.

n	a(n)
0	0
1	1
2	-1
3	-4
4	-8
5	-3
6	3
7	-4
8	4
9	13
10	23
11	12
12	0
13	-13
14	-27
15	-42
16	-26
17	-9
18	-27
19	-8
20	12
21	-9
22	-31
23	-8
24	-32
25	-57
26	-31
27	-58
28	-86
29	-115
30	-145
31	-176
32	-144
33	-111
34	-77
35	-112
36	-148
37	-111
38	-149
39	-188
40	-228
41	-187
42	-229
43	-272
44	-316
45	-271
46	-317
47	-270
48	-318
49	-269
50	-319
51	-370
52	-318
53	-371
54	-317
55	-372
56	-316

[0, 1, -1, -4, -8, -3, 3, -4, 4, 13, 23, 12, 0, -13, -27, -42, -26, -9, -27, -8, 12, -9, -31, -8, -32, -57, -31, -58, -86, -115, -145, -176, -144, -111, -77, -112, -148, -111, -149, -188, -228, -187, -229, -272, -316, -271, -317, -270, -318, -269, -319, -370, -318, -371, -317, -372, -316]

cp's OEIS Frontend

A309217 The sequence is {a(n), n>=0}, the concatenation of the binary expansions of the absolute values |a(n)| is {b(n), n>=0}; start with a(0)=0; thereafter a(n) = a(n-1)+n if b(n-1)=0, otherwise a(n) = a(n-1)-n.

Table of values

List of values