A049964 - cp's OEIS frontend

A049964 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, 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, a(2) = 3, and a(3) = 1.

n	a(n)
1	1
2	3
3	1
4	6
5	12
6	24
7	48
8	107
9	250
10	453
11	906
12	1823
13	3682
14	7566
15	15788
16	34352
17	80810
18	145833
19	291666
20	583343
21	1166722
22	2333646
23	4667948
24	9338672
25	18689450
26	37443922
27	75098700
28	151072456
29	305646138
30	625313778
31	1307036806
32	2844621050
33	6690632768
34	12074228731
35	24148457462
36	48296914935
37	96593829906

[1, 3, 1, 6, 12, 24, 48, 107, 250, 453, 906, 1823, 3682, 7566, 15788, 34352, 80810, 145833, 291666, 583343, 1166722, 2333646, 4667948, 9338672, 18689450, 37443922, 75098700, 151072456, 305646138, 625313778, 1307036806, 2844621050, 6690632768, 12074228731, 24148457462, 48296914935, 96593829906]

cp's OEIS Frontend

A049964 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, 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, a(2) = 3, and a(3) = 1.

Table of values

List of values