A128609 - OEIS

A128609 as a simple table

n	a(n)
1	1
2	1
3	2
4	4
5	7
6	13
7	23
8	40
9	67
10	112
11	184
12	301
13	490
14	796
15	1291
16	2093
17	3390
18	5489
19	8885
20	14380
21	23271
22	37657
23	60935
24	98599
25	159541
26	258148
27	417697
28	675853
29	1093558
30	1769419
31	2862985
32	4632412
33	7495405
34	12127825
35	19623238
36	31751071
37	51374317

[1,1,2,4,7,13,23,40,67,112,184,301,490,796,1291, 2093,3390,5489,8885,14380,23271,37657,60935,98599, 159541,258148,417697,675853,1093558,1769419, 2862985,4632412,7495405,12127825,19623238, 31751071,51374317]