A049933 - cp's OEIS frontend

A049933 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) = a(2) = a(3) = 1.

n	a(n)
1	1
2	1
3	1
4	4
5	8
6	19
7	35
8	70
9	140
10	349
11	663
12	1310
13	2609
14	5214
15	10425
16	20850
17	41700
18	104249
19	198073
20	390935
21	779265
22	1557231
23	3113815
24	6227316
25	12454423
26	24908776
27	49817517
28	99635018
29	199270025
30	398540046
31	797080089
32	1594160178
33	3188320356
34	7970800889
35	15144521689

[1, 1, 1, 4, 8, 19, 35, 70, 140, 349, 663, 1310, 2609, 5214, 10425, 20850, 41700, 104249, 198073, 390935, 779265, 1557231, 3113815, 6227316, 12454423, 24908776, 49817517, 99635018, 199270025, 398540046, 797080089, 1594160178, 3188320356, 7970800889, 15144521689]

cp's OEIS Frontend

A049933 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) = a(2) = a(3) = 1.

Table of values

List of values