A018150 - OEIS

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A018150 as a simple table

n	a(n)
0	1
1	1
2	2
3	4
4	7
5	13
6	21
7	36
8	60
9	101
10	169
11	282
12	471
13	787
14	1315
15	2197
16	3669
17	6129
18	10237
19	17099
20	28561
21	47704
22	79680
23	133088
24	222294
25	371293
26	620162
27	1035843
28	1730146
29	2889824
30	4826809
31	8062111
32	13465964

[1,1,2,4,7,13,21,36,60,101,169,282,471,787,1315, 2197,3669,6129,10237,17099,28561,47704,79680, 133088,222294,371293,620162,1035843,1730146, 2889824,4826809,8062111,13465964]