A049939 - cp's OEIS frontend

A049939 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) = a(2) = 1 and a(3) = 2.

n	a(n)
1	1
2	1
3	2
4	5
5	14
6	24
7	52
8	123
9	345
10	568
11	1140
12	2299
13	4697
14	9839
15	21409
16	50358
17	141235
18	232113
19	464230
20	928479
21	1857057
22	3714559
23	7430849
24	14869238
25	29778995
26	59739745
27	120175856
28	243137792
29	497430263
30	1039731033
31	2262860113

[1, 1, 2, 5, 14, 24, 52, 123, 345, 568, 1140, 2299, 4697, 9839, 21409, 50358, 141235, 232113, 464230, 928479, 1857057, 3714559, 7430849, 14869238, 29778995, 59739745, 120175856, 243137792, 497430263, 1039731033, 2262860113]

cp's OEIS Frontend

A049939 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) = a(2) = 1 and a(3) = 2.

Table of values

List of values