A068604 - OEIS

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A068604 as a simple table

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	9
7	16
8	29
9	51
10	84
11	138
12	227
13	370
14	603
15	980
16	1589
17	2576
18	4172
19	6756
20	10936
21	17700
22	28646
23	46357
24	75013
25	121381
26	196405

[1,1,2,3,6,9,16,29,51,84,138,227,370,603,980,1589, 2576,4172,6756,10936,17700,28646,46357,75013, 121381,196405]