A050039 - cp's OEIS frontend

A050039 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(2) = 4.

n	a(n)
1	1
2	1
3	4
4	5
5	10
6	11
7	16
8	27
9	54
10	55
11	60
12	71
13	98
14	153
15	224
16	377
17	754
18	755
19	760
20	771
21	798
22	853
23	924
24	1077
25	1454
26	2209
27	2980
28	3833
29	4910
30	7119
31	10952
32	18071
33	36142
34	36143
35	36148
36	36159
37	36186
38	36241
39	36312
40	36465
41	36842
42	37597
43	38368

[1, 1, 4, 5, 10, 11, 16, 27, 54, 55, 60, 71, 98, 153, 224, 377, 754, 755, 760, 771, 798, 853, 924, 1077, 1454, 2209, 2980, 3833, 4910, 7119, 10952, 18071, 36142, 36143, 36148, 36159, 36186, 36241, 36312, 36465, 36842, 37597, 38368]

cp's OEIS Frontend

A050039 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(2) = 4.

Table of values

List of values