A120134 - cp's OEIS frontend

A120134 a(n) = 4 + floor(Sum_{k=1..n-1} a(k) / 2).

n	a(n)
1	4
2	6
3	9
4	13
5	20
6	30
7	45
8	67
9	101
10	151
11	227
12	340
13	510
14	765
15	1148
16	1722
17	2583
18	3874
19	5811
20	8717
21	13075
22	19613
23	29419
24	44129
25	66193
26	99290
27	148935
28	223402
29	335103
30	502655
31	753982
32	1130973
33	1696460
34	2544690
35	3817035
36	5725552
37	8588328
38	12882492

[4, 6, 9, 13, 20, 30, 45, 67, 101, 151, 227, 340, 510, 765, 1148, 1722, 2583, 3874, 5811, 8717, 13075, 19613, 29419, 44129, 66193, 99290, 148935, 223402, 335103, 502655, 753982, 1130973, 1696460, 2544690, 3817035, 5725552, 8588328, 12882492]

cp's OEIS Frontend

A120134 a(n) = 4 + floor(Sum_{k=1..n-1} a(k) / 2).

Table of values

List of values