A050043 - cp's OEIS frontend

A050043 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) = 1, a(2) = 2, and a(3) = 1.

n	a(n)
1	1
2	2
3	1
4	3
5	6
6	8
7	11
8	19
9	38
10	40
11	43
12	51
13	70
14	110
15	161
16	271
17	542
18	544
19	547
20	555
21	574
22	614
23	665
24	775
25	1046
26	1590
27	2145
28	2759
29	3534
30	5124
31	7883
32	13007
33	26014
34	26016
35	26019
36	26027
37	26046
38	26086
39	26137
40	26247
41	26518
42	27062
43	27617

[1, 2, 1, 3, 6, 8, 11, 19, 38, 40, 43, 51, 70, 110, 161, 271, 542, 544, 547, 555, 574, 614, 665, 775, 1046, 1590, 2145, 2759, 3534, 5124, 7883, 13007, 26014, 26016, 26019, 26027, 26046, 26086, 26137, 26247, 26518, 27062, 27617]

cp's OEIS Frontend

A050043 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) = 1, a(2) = 2, and a(3) = 1.

Table of values

List of values