A049929 - cp's OEIS frontend

A049929 a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n-1 <= 2^(p+1), starting with a(1) = 1, a(2) = 3, and a(3) = 4.

n	a(n)
1	1
2	3
3	4
4	5
5	12
6	20
7	41
8	83
9	168
10	254
11	550
12	1121
13	2250
14	4507
15	9015
16	18031
17	36064
18	54098
19	117212
20	238932
21	480121
22	961371
23	1923313
24	3846922
25	7693930
26	15387945
27	30775932
28	61551885
29	123103778
30	246207563
31	492415127
32	984830255
33	1969660512

[1, 3, 4, 5, 12, 20, 41, 83, 168, 254, 550, 1121, 2250, 4507, 9015, 18031, 36064, 54098, 117212, 238932, 480121, 961371, 1923313, 3846922, 7693930, 15387945, 30775932, 61551885, 123103778, 246207563, 492415127, 984830255, 1969660512]

cp's OEIS Frontend

A049929 a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n-1 <= 2^(p+1), starting with a(1) = 1, a(2) = 3, and a(3) = 4.

Table of values

List of values