n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 52 |
5 | 229 |
6 | 1006 |
7 | 4387 |
8 | 18978 |
9 | 81489 |
10 | 347614 |
11 | 1474436 |
12 | 6223328 |
13 | 26156242 |
14 | 109528108 |
15 | 457167817 |
16 | 1902808318 |
17 | 7899987577 |
18 | 32725812958 |
19 | 135297527872 |
20 | 558357811048 |
21 | 2300564293942 |
22 | 9465003608548 |
23 | 38889193275142 |
24 | 159591154157092 |
25 | 654190748282074 |
[1,1,3,12,52,229,1006,4387,18978,81489,347614, 1474436,6223328,26156242,109528108,457167817, 1902808318,7899987577,32725812958,135297527872, 558357811048,2300564293942,9465003608548, 38889193275142,159591154157092,654190748282074] |