A033539 - cp's OEIS frontend

A033539 a(0)=1, a(1)=1, a(2)=1, a(n) = 2*a(n-1) + a(n-2) + 1.

n	a(n)
0	1
1	1
2	1
3	4
4	10
5	25
6	61
7	148
8	358
9	865
10	2089
11	5044
12	12178
13	29401
14	70981
15	171364
16	413710
17	998785
18	2411281
19	5821348
20	14053978
21	33929305
22	81912589
23	197754484
24	477421558
25	1152597601
26	2782616761
27	6717831124
28	16218279010
29	39154389145

[1, 1, 1, 4, 10, 25, 61, 148, 358, 865, 2089, 5044, 12178, 29401, 70981, 171364, 413710, 998785, 2411281, 5821348, 14053978, 33929305, 81912589, 197754484, 477421558, 1152597601, 2782616761, 6717831124, 16218279010, 39154389145]

cp's OEIS Frontend

A033539 a(0)=1, a(1)=1, a(2)=1, a(n) = 2*a(n-1) + a(n-2) + 1.

Table of values

List of values