A049970 - cp's OEIS frontend

A049970 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 3, and a(3) = 2.

n	a(n)
1	1
2	3
3	2
4	7
5	16
6	30
7	62
8	123
9	251
10	496
11	994
12	1987
13	3979
14	7967
15	15948
16	31928
17	63917
18	127712
19	255426
20	510851
21	1021707
22	2043423
23	4086860
24	8173752
25	16347565
26	32695258
27	65390761
28	130782020
29	261565033
30	523132058
31	1046268104
32	2092544189

[1, 3, 2, 7, 16, 30, 62, 123, 251, 496, 994, 1987, 3979, 7967, 15948, 31928, 63917, 127712, 255426, 510851, 1021707, 2043423, 4086860, 8173752, 16347565, 32695258, 65390761, 130782020, 261565033, 523132058, 1046268104, 2092544189]

cp's OEIS Frontend

A049970 a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 3, and a(3) = 2.

Table of values

List of values