n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 26 |
4 | 90 |
5 | 340 |
6 | 1238 |
7 | 4647 |
8 | 17578 |
9 | 67592 |
10 | 259768 |
11 | 1004348 |
12 | 3902357 |
13 | 15202050 |
14 | 59410557 |
15 | 232483840 |
16 | 911689012 |
17 | 3581049040 |
18 | 14081089288 |
19 | 55439171531 |
20 | 218457593223 |
21 | 861617935051 |
22 | 3400917861268 |
23 | 13433148229639 |
24 | 53092686926155 |
25 | 209962593513292 |
[1,2,7,26,90,340,1238,4647,17578,67592,259768, 1004348,3902357,15202050,59410557,232483840, 911689012,3581049040,14081089288,55439171531, 218457593223,861617935051,3400917861268, 13433148229639,53092686926155,209962593513292] |