n | a(n) |
---|---|
1 | 1 |
2 | 10 |
3 | 39 |
4 | 148 |
5 | 405 |
6 | 1254 |
7 | 3143 |
8 | 8488 |
9 | 20853 |
10 | 52050 |
11 | 123915 |
12 | 297804 |
13 | 692237 |
14 | 1611974 |
15 | 3687795 |
16 | 8405584 |
17 | 18939921 |
18 | 42512562 |
19 | 94634003 |
20 | 209819940 |
21 | 462431697 |
22 | 1015269486 |
23 | 2218786839 |
24 | 4832458392 |
25 | 10485762025 |
26 | 22684180610 |
27 | 48922424415 |
28 | 105229923596 |
[1,10,39,148,405,1254,3143,8488,20853,52050, 123915,297804,692237,1611974,3687795,8405584, 18939921,42512562,94634003,209819940,462431697, 1015269486,2218786839,4832458392,10485762025, 22684180610,48922424415,105229923596] |