A151914 - cp's OEIS frontend

A151914 a(0)=0, a(1)=4; for n>=2, a(n) = (8/3)*(Sum_{i=1..n-1} 3^wt(i)) + 4, where wt() = A000120().

n	a(n)
0	0
1	4
2	12
3	20
4	44
5	52
6	76
7	100
8	172
9	180
10	204
11	228
12	300
13	324
14	396
15	468
16	684
17	692
18	716
19	740
20	812
21	836
22	908
23	980
24	1196
25	1220
26	1292
27	1364
28	1580
29	1652
30	1868
31	2084
32	2732
33	2740
34	2764
35	2788
36	2860
37	2884
38	2956
39	3028
40	3244
41	3268
42	3340
43	3412
44	3628
45	3700
46	3916
47	4132
48	4780

[0, 4, 12, 20, 44, 52, 76, 100, 172, 180, 204, 228, 300, 324, 396, 468, 684, 692, 716, 740, 812, 836, 908, 980, 1196, 1220, 1292, 1364, 1580, 1652, 1868, 2084, 2732, 2740, 2764, 2788, 2860, 2884, 2956, 3028, 3244, 3268, 3340, 3412, 3628, 3700, 3916, 4132, 4780]

cp's OEIS Frontend

A151914 a(0)=0, a(1)=4; for n>=2, a(n) = (8/3)*(Sum_{i=1..n-1} 3^wt(i)) + 4, where wt() = A000120().

Table of values

List of values