A049960 - cp's OEIS frontend

A049960 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 3, where m = 2*n - 3 - 2^(p+1) and p is the unique integer such that 2^p < n-1 <= 2^(p+1), with a(1) = 1 and a(2) = 2.

n	a(n)
1	1
2	2
3	4
4	8
5	19
6	35
7	73
8	161
9	376
10	680
11	1363
12	2741
13	5536
14	11375
15	23737
16	51647
17	121495
18	219254
19	438511
20	877037
21	1754128
22	3508559
23	7018105
24	14040383
25	28098967
26	56295692
27	112908400
28	227132417
29	459528811
30	940138484
31	1965086401
32	4276793213
33	10059144016
34	18153201632
35	36306403267

[1, 2, 4, 8, 19, 35, 73, 161, 376, 680, 1363, 2741, 5536, 11375, 23737, 51647, 121495, 219254, 438511, 877037, 1754128, 3508559, 7018105, 14040383, 28098967, 56295692, 112908400, 227132417, 459528811, 940138484, 1965086401, 4276793213, 10059144016, 18153201632, 36306403267]

cp's OEIS Frontend

A049960 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 3, where m = 2*n - 3 - 2^(p+1) and p is the unique integer such that 2^p < n-1 <= 2^(p+1), with a(1) = 1 and a(2) = 2.

Table of values

List of values