A105229 - cp's OEIS frontend

A105229 a(n) = Sum_{k=0..n} (1-(-1)^( floor( (-n-k)/2^k ) )) * 2^(k-1).

n	a(n)
0	0
1	3
2	4
3	9
4	26
5	59
6	112
7	245
8	502
9	1015
10	2036
11	4081
12	8178
13	16355
14	32744
15	65517
16	131054
17	262127
18	524268
19	1048553
20	2097130
21	4194283
22	8388576
23	16777189
24	33554406
25	67108839
26	134217700
27	268435425
28	536870850
29	1073741779
30	2147483608
31	4294967261
32	8589934558

[0, 3, 4, 9, 26, 59, 112, 245, 502, 1015, 2036, 4081, 8178, 16355, 32744, 65517, 131054, 262127, 524268, 1048553, 2097130, 4194283, 8388576, 16777189, 33554406, 67108839, 134217700, 268435425, 536870850, 1073741779, 2147483608, 4294967261, 8589934558]

cp's OEIS Frontend

A105229 a(n) = Sum_{k=0..n} (1-(-1)^( floor( (-n-k)/2^k ) )) * 2^(k-1).

Table of values

List of values