A259665 - cp's OEIS frontend

A259665 a(0)=0, a(1)=1, a(n) = min{4 a(k) + (4^(n-k)-1)/3, k=0..(n-1)} for n>=2.

n	a(n)
0	0
1	1
2	5
3	9
4	25
5	41
6	57
7	121
8	185
9	249
10	313
11	569
12	825
13	1081
14	1337
15	1593
16	2617
17	3641
18	4665
19	5689
20	6713
21	7737
22	11833
23	15929
24	20025
25	24121
26	28217
27	32313
28	36409
29	52793
30	69177
31	85561
32	101945
33	118329
34	134713
35	151097
36	167481
37	233017
38	298553
39	364089
40	429625
41	495161

[0, 1, 5, 9, 25, 41, 57, 121, 185, 249, 313, 569, 825, 1081, 1337, 1593, 2617, 3641, 4665, 5689, 6713, 7737, 11833, 15929, 20025, 24121, 28217, 32313, 36409, 52793, 69177, 85561, 101945, 118329, 134713, 151097, 167481, 233017, 298553, 364089, 429625, 495161]

cp's OEIS Frontend

A259665 a(0)=0, a(1)=1, a(n) = min{4 a(k) + (4^(n-k)-1)/3, k=0..(n-1)} for n>=2.

Table of values

List of values