n | a(n) |
---|---|
1 | 0 |
2 | 6 |
3 | 10 |
4 | 32 |
5 | 78 |
6 | 210 |
7 | 544 |
8 | 1430 |
9 | 3738 |
10 | 9792 |
11 | 25630 |
12 | 67106 |
13 | 175680 |
14 | 459942 |
15 | 1204138 |
16 | 3152480 |
17 | 8253294 |
18 | 21607410 |
19 | 56568928 |
20 | 148099382 |
21 | 387729210 |
22 | 1015088256 |
23 | 2657535550 |
24 | 6957518402 |
25 | 18215019648 |
26 | 47687540550 |
27 | 124847601994 |
[0,6,10,32,78,210,544,1430,3738,9792,25630,67106, 175680,459942,1204138,3152480,8253294,21607410, 56568928,148099382,387729210,1015088256, 2657535550,6957518402,18215019648,47687540550, 124847601994] |