A050031 - cp's OEIS frontend

A050031 a(n) = 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), starting with a(1) = a(2) = 1 and a(3) = 2.

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	7
7	10
8	17
9	34
10	35
11	38
12	45
13	62
14	97
15	142
16	239
17	478
18	479
19	482
20	489
21	506
22	541
23	586
24	683
25	922
26	1401
27	1890
28	2431
29	3114
30	4515
31	6946
32	11461
33	22922
34	22923
35	22926
36	22933
37	22950
38	22985
39	23030
40	23127
41	23366
42	23845
43	24334

[1, 1, 2, 3, 6, 7, 10, 17, 34, 35, 38, 45, 62, 97, 142, 239, 478, 479, 482, 489, 506, 541, 586, 683, 922, 1401, 1890, 2431, 3114, 4515, 6946, 11461, 22922, 22923, 22926, 22933, 22950, 22985, 23030, 23127, 23366, 23845, 24334]

cp's OEIS Frontend

A050031 a(n) = 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), starting with a(1) = a(2) = 1 and a(3) = 2.

Table of values

List of values