A050053 - cp's OEIS frontend

A050053 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) = 1, a(2) = 2, and a(3) = 4.

n	a(n)
1	1
2	2
3	4
4	6
5	7
6	13
7	17
8	19
9	20
10	39
11	56
12	69
13	76
14	82
15	86
16	88
17	89
18	177
19	263
20	345
21	421
22	490
23	546
24	585
25	605
26	624
27	641
28	654
29	661
30	667
31	671
32	673
33	674
34	1347
35	2018
36	2685
37	3346
38	4000
39	4641
40	5265
41	5870
42	6455
43	7001
44	7491
45	7912
46	8257
47	8520
48	8697

[1, 2, 4, 6, 7, 13, 17, 19, 20, 39, 56, 69, 76, 82, 86, 88, 89, 177, 263, 345, 421, 490, 546, 585, 605, 624, 641, 654, 661, 667, 671, 673, 674, 1347, 2018, 2685, 3346, 4000, 4641, 5265, 5870, 6455, 7001, 7491, 7912, 8257, 8520, 8697]

cp's OEIS Frontend

A050053 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) = 1, a(2) = 2, and a(3) = 4.

Table of values

List of values