A218021-OEIS公司

A218021型作为一个简单的表

n个	a（n）
0	0
1	1
2	1
三	1
4	1
5	1
6	2
7	三
8	5
9	7
10	12
11	18
12	30
13	47
14	78
15	125
16	209
17	341
18	571
19	946
20	1592
21	2663
22	4503
23	7594
24	12898
25	21891
26	37334
27	63691
28	109039
29	186816
30	320913
31	551829
32	950842
33	1640149
34	2833866
35	4901658
36	8490019
37	14720477
38	25553525
39	44401638
40	77232183
41	134457819

[0,1,1,1,1,1,2,3,5,7,12,18,30,47,78,125,209,341,571,946,1592,2663,4503,7594,12898,21891,37334,63691,109039,186816,320913,551829,950842,1640149,2833866,4901658,8490019,14720477,25553525,44401638,77232183,134457819]