n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 15 |
4 | 45 |
5 | 105 |
6 | 302 |
7 | 668 |
8 | 1664 |
9 | 3830 |
10 | 8793 |
11 | 19350 |
12 | 43265 |
13 | 92552 |
14 | 198418 |
15 | 418128 |
16 | 869999 |
17 | 1787964 |
18 | 3651028 |
19 | 7353349 |
20 | 14697367 |
21 | 29139447 |
22 | 57225893 |
23 | 111572329 |
24 | 216001937 |
25 | 415000057 |
26 | 792008753 |
27 | 1502559866 |
28 | 2831393559 |
29 | 5305614223 |
30 | 9885825732 |
31 | 18318165218 |
[1,1,6,15,45,105,302,668,1664,3830,8793,19350, 43265,92552,198418,418128,869999,1787964,3651028, 7353349,14697367,29139447,57225893,111572329, 216001937,415000057,792008753,1502559866, 2831393559,5305614223,9885825732,18318165218] |