A050047 - cp's OEIS frontend

A050047 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 and a(2) = a(3) = 2.

n	a(n)
1	1
2	2
3	2
4	4
5	8
6	10
7	14
8	24
9	48
10	50
11	54
12	64
13	88
14	138
15	202
16	340
17	680
18	682
19	686
20	696
21	720
22	770
23	834
24	972
25	1312
26	1994
27	2690
28	3460
29	4432
30	6426
31	9886
32	16312
33	32624
34	32626
35	32630
36	32640
37	32664
38	32714
39	32778
40	32916
41	33256
42	33938
43	34634

[1, 2, 2, 4, 8, 10, 14, 24, 48, 50, 54, 64, 88, 138, 202, 340, 680, 682, 686, 696, 720, 770, 834, 972, 1312, 1994, 2690, 3460, 4432, 6426, 9886, 16312, 32624, 32626, 32630, 32640, 32664, 32714, 32778, 32916, 33256, 33938, 34634]

cp's OEIS Frontend

A050047 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 and a(2) = a(3) = 2.

Table of values

List of values