n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 11 |
6 | 26 |
7 | 50 |
8 | 315 |
9 | 1168 |
10 | 3309 |
11 | 7910 |
12 | 78134 |
13 | 431354 |
14 | 1748956 |
15 | 5797168 |
16 | 16619603 |
17 | 239887424 |
18 | 1875375485 |
19 | 10496708022 |
20 | 47013492080 |
21 | 178807998112 |
22 | 599025922320 |
23 | 11965846097382 |
24 | 126883998286089 |
25 | 947079890934441 |
26 | 5574231845278396 |
27 | 27500583638094490 |
[1,1,1,2,3,11,26,50,315,1168,3309,7910,78134, 431354,1748956,5797168,16619603,239887424, 1875375485,10496708022,47013492080,178807998112, 599025922320,11965846097382,126883998286089, 947079890934441,5574231845278396, 27500583638094490] |