n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 42 |
5 | 156 |
6 | 554 |
7 | 2028 |
8 | 7350 |
9 | 26936 |
10 | 98874 |
11 | 365196 |
12 | 1353520 |
13 | 5039580 |
14 | 18831306 |
15 | 70626140 |
16 | 265741350 |
17 | 1002984060 |
18 | 3796211692 |
19 | 14406086604 |
20 | 54801192684 |
21 | 208932673508 |
22 | 798218225802 |
23 | 3055417434732 |
24 | 11716355452900 |
[1,3,12,42,156,554,2028,7350,26936,98874,365196, 1353520,5039580,18831306,70626140,265741350, 1002984060,3796211692,14406086604,54801192684, 208932673508,798218225802,3055417434732, 11716355452900] |