n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 21 |
4 | 55 |
5 | 143 |
6 | 366 |
7 | 919 |
8 | 2265 |
9 | 5491 |
10 | 13125 |
11 | 31000 |
12 | 72485 |
13 | 168042 |
14 | 386709 |
15 | 884161 |
16 | 2009742 |
17 | 4543830 |
18 | 10222264 |
19 | 22891099 |
20 | 51041560 |
21 | 113359224 |
22 | 250839510 |
23 | 553173006 |
24 | 1216070081 |
25 | 2665518207 |
26 | 5826533103 |
27 | 12703217438 |
28 | 27628250142 |
[1,3,8,21,55,143,366,919,2265,5491,13125,31000, 72485,168042,386709,884161,2009742,4543830, 10222264,22891099,51041560,113359224,250839510, 553173006,1216070081,2665518207,5826533103, 12703217438,27628250142] |