n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 14 |
3 | 70 |
4 | 353 |
5 | 1782 |
6 | 8997 |
7 | 45425 |
8 | 229347 |
9 | 1157954 |
10 | 5846414 |
11 | 29518061 |
12 | 149034250 |
13 | 752461609 |
14 | 3799116465 |
15 | 19181424995 |
16 | 96845429254 |
17 | 488964567014 |
18 | 2468741680809 |
19 | 12464472679038 |
20 | 62932092237197 |
21 | 317738931708801 |
[1,3,14,70,353,1782,8997,45425,229347,1157954, 5846414,29518061,149034250,752461609,3799116465, 19181424995,96845429254,488964567014, 2468741680809,12464472679038,62932092237197, 317738931708801] |