A049918-OEIS公司

A049918号作为一个简单的表

n个	a（n）
1	1
2	三
三	1
4	4
5	6
6	14
7	26
8	54
9	105
10	213
11	424
12	850
13	1697
14	3392
15	6776
16	13540
17	27052
18	54157
19	108312
20	216626
21	433249
22	866496
23	1732984
24	3465956
25	6931884
26	13863717
27	27727326
28	55454441
29	110908456
30	221816065
31	443630435
32	887257486
33	1774508208

[1,3,1,4,6,14,26,54,105,213,424,850,1697,3392,6776,13540,27052,54157,108312,216626,433249,866496,1732984,3465956,6931884,13863717,27727326,55454441,110908456,221816065,443630435,887257486,1774508208]