n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 54 |
5 | 218 |
6 | 790 |
7 | 2614 |
8 | 7989 |
9 | 22756 |
10 | 60950 |
11 | 154631 |
12 | 373880 |
13 | 866019 |
14 | 1930121 |
15 | 4154593 |
16 | 8664718 |
17 | 17557769 |
18 | 34651632 |
19 | 66747915 |
20 | 125725045 |
21 | 231949573 |
22 | 419750808 |
23 | 746081780 |
24 | 1304039046 |
25 | 2243705012 |
26 | 3803904385 |
27 | 6360060015 |
28 | 10495565911 |
29 | 17107197521 |
[1,3,12,54,218,790,2614,7989,22756,60950,154631, 373880,866019,1930121,4154593,8664718,17557769, 34651632,66747915,125725045,231949573,419750808, 746081780,1304039046,2243705012,3803904385, 6360060015,10495565911,17107197521] |