A259653 - cp's OEIS frontend

A259653 a(0)=0, a(1)=1, a(n) = min{3 a(k) + (3^(n-k)-1)/2, k=0..(n-1)} for n>=2.

n	a(n)
0	0
1	1
2	4
3	7
4	16
5	25
6	34
7	61
8	88
9	115
10	142
11	223
12	304
13	385
14	466
15	547
16	790
17	1033
18	1276
19	1519
20	1762
21	2005
22	2734
23	3463
24	4192
25	4921
26	5650
27	6379
28	7108
29	9295
30	11482
31	13669
32	15856
33	18043
34	20230
35	22417
36	24604
37	31165
38	37726
39	44287
40	50848
41	57409
42	63970
43	70531
44	77092

[0, 1, 4, 7, 16, 25, 34, 61, 88, 115, 142, 223, 304, 385, 466, 547, 790, 1033, 1276, 1519, 1762, 2005, 2734, 3463, 4192, 4921, 5650, 6379, 7108, 9295, 11482, 13669, 15856, 18043, 20230, 22417, 24604, 31165, 37726, 44287, 50848, 57409, 63970, 70531, 77092]

cp's OEIS Frontend

A259653 a(0)=0, a(1)=1, a(n) = min{3 a(k) + (3^(n-k)-1)/2, k=0..(n-1)} for n>=2.

Table of values

List of values