n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 27 |
3 | 110 |
4 | 429 |
5 | 1637 |
6 | 6172 |
7 | 23104 |
8 | 86090 |
9 | 319792 |
10 | 1185305 |
11 | 4386331 |
12 | 16212913 |
13 | 59873834 |
14 | 220964744 |
15 | 815057639 |
16 | 3005282745 |
17 | 11077802256 |
18 | 40824723483 |
19 | 150424044413 |
20 | 554183037617 |
21 | 2041477665799 |
22 | 7519722443381 |
23 | 27696997721940 |
24 | 102010147865915 |
25 | 375697698147882 |
[1,6,27,110,429,1637,6172,23104,86090,319792, 1185305,4386331,16212913,59873834,220964744, 815057639,3005282745,11077802256,40824723483, 150424044413,554183037617,2041477665799, 7519722443381,27696997721940,102010147865915, 375697698147882] |