A151917 - cp's OEIS frontend

A151917 a(0)=0, a(1)=1; for n>=2, a(n) = (2/3)*(Sum_{i=1..n-1} 3^wt(i)) + 1, where wt() = A000120().

n	a(n)
0	0
1	1
2	3
3	5
4	11
5	13
6	19
7	25
8	43
9	45
10	51
11	57
12	75
13	81
14	99
15	117
16	171
17	173
18	179
19	185
20	203
21	209
22	227
23	245
24	299
25	305
26	323
27	341
28	395
29	413
30	467
31	521
32	683
33	685
34	691
35	697
36	715
37	721
38	739
39	757
40	811
41	817
42	835
43	853
44	907
45	925
46	979
47	1033
48	1195
49	1201
50	1219

[0, 1, 3, 5, 11, 13, 19, 25, 43, 45, 51, 57, 75, 81, 99, 117, 171, 173, 179, 185, 203, 209, 227, 245, 299, 305, 323, 341, 395, 413, 467, 521, 683, 685, 691, 697, 715, 721, 739, 757, 811, 817, 835, 853, 907, 925, 979, 1033, 1195, 1201, 1219]

cp's OEIS Frontend

A151917 a(0)=0, a(1)=1; for n>=2, a(n) = (2/3)*(Sum_{i=1..n-1} 3^wt(i)) + 1, where wt() = A000120().

Table of values

List of values