n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 25 |
5 | 88 |
6 | 273 |
7 | 903 |
8 | 2890 |
9 | 9405 |
10 | 30349 |
11 | 98352 |
12 | 318045 |
13 | 1029587 |
14 | 3331210 |
15 | 10781001 |
16 | 34886465 |
17 | 112897544 |
18 | 365339961 |
19 | 1182271695 |
20 | 3825900650 |
21 | 12380892261 |
22 | 40065380357 |
23 | 129654340704 |
24 | 419570185125 |
25 | 1357757761723 |
[0,1,2,9,25,88,273,903,2890,9405,30349,98352, 318045,1029587,3331210,10781001,34886465, 112897544,365339961,1182271695,3825900650, 12380892261,40065380357,129654340704,419570185125, 1357757761723] |