A050027 - cp's OEIS frontend

A050027 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) = a(3) = 1.

n	a(n)
1	1
2	1
3	1
4	2
5	4
6	5
7	7
8	12
9	24
10	25
11	27
12	32
13	44
14	69
15	101
16	170
17	340
18	341
19	343
20	348
21	360
22	385
23	417
24	486
25	656
26	997
27	1345
28	1730
29	2216
30	3213
31	4943
32	8156
33	16312
34	16313
35	16315
36	16320
37	16332
38	16357
39	16389
40	16458
41	16628
42	16969
43	17317
44	17702

[1, 1, 1, 2, 4, 5, 7, 12, 24, 25, 27, 32, 44, 69, 101, 170, 340, 341, 343, 348, 360, 385, 417, 486, 656, 997, 1345, 1730, 2216, 3213, 4943, 8156, 16312, 16313, 16315, 16320, 16332, 16357, 16389, 16458, 16628, 16969, 17317, 17702]

cp's OEIS Frontend

A050027 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) = a(3) = 1.

Table of values

List of values