A049977 - cp's OEIS frontend

A049977 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), with a(1) = 1, a(2) = 3, and a(3) = 4.

n	a(n)
1	1
2	3
3	4
4	11
5	20
6	50
7	93
8	185
9	368
10	920
11	1748
12	3453
13	6876
14	13743
15	27479
16	54957
17	109912
18	274780
19	522082
20	1030428
21	2053989
22	4104555
23	8207405
24	16413982
25	32827412
26	65654641
27	131309190
28	262618337
29	525236644
30	1050473279
31	2100946551
32	4201893101
33	8403786200
34	21009465500
35	39917984450

[1, 3, 4, 11, 20, 50, 93, 185, 368, 920, 1748, 3453, 6876, 13743, 27479, 54957, 109912, 274780, 522082, 1030428, 2053989, 4104555, 8207405, 16413982, 32827412, 65654641, 131309190, 262618337, 525236644, 1050473279, 2100946551, 4201893101, 8403786200, 21009465500, 39917984450]

cp's OEIS Frontend

A049977 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), with a(1) = 1, a(2) = 3, and a(3) = 4.

Table of values

List of values