A049979 - cp's OEIS frontend

A049979 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) 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	30
6	52
7	112
8	265
9	743
10	1224
11	2456
12	4953
13	10119
14	21197
15	46123
16	108490
17	304273
18	500059
19	1000126
20	2000293
21	4000799
22	8002557
23	16008843
24	32033930
25	64155153
26	128701875
27	258903984
28	523810232
29	1071651837
30	2239971619

[1, 3, 4, 11, 30, 52, 112, 265, 743, 1224, 2456, 4953, 10119, 21197, 46123, 108490, 304273, 500059, 1000126, 2000293, 4000799, 8002557, 16008843, 32033930, 64155153, 128701875, 258903984, 523810232, 1071651837, 2239971619]

cp's OEIS Frontend

A049979 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) 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