A050025 - cp's OEIS frontend

A050025 a(n) = 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	2
5	3
6	5
7	6
8	7
9	8
10	15
11	21
12	26
13	29
14	31
15	32
16	33
17	34
18	67
19	99
20	130
21	159
22	185
23	206
24	221
25	229
26	236
27	242
28	247
29	250
30	252
31	253
32	254
33	255
34	509
35	762
36	1014
37	1264
38	1511
39	1753
40	1989
41	2218
42	2439
43	2645
44	2830
45	2989
46	3119
47	3218
48	3285
49	3319

[1, 1, 1, 2, 3, 5, 6, 7, 8, 15, 21, 26, 29, 31, 32, 33, 34, 67, 99, 130, 159, 185, 206, 221, 229, 236, 242, 247, 250, 252, 253, 254, 255, 509, 762, 1014, 1264, 1511, 1753, 1989, 2218, 2439, 2645, 2830, 2989, 3119, 3218, 3285, 3319]

cp's OEIS Frontend

A050025 a(n) = 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