n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 27 |
3 | 110 |
4 | 387 |
5 | 1266 |
6 | 3896 |
7 | 11340 |
8 | 31629 |
9 | 84992 |
10 | 221028 |
11 | 558450 |
12 | 1375615 |
13 | 3310764 |
14 | 7803069 |
15 | 18044374 |
16 | 40998078 |
17 | 91653990 |
18 | 201842383 |
19 | 438312534 |
20 | 939439674 |
21 | 1988944070 |
22 | 4162521165 |
23 | 8617025112 |
24 | 17655688602 |
25 | 35823617658 |
26 | 72015578091 |
27 | 143499705550 |
28 | 283544586489 |
29 | 555779906772 |
[1,6,27,110,387,1266,3896,11340,31629,84992, 221028,558450,1375615,3310764,7803069,18044374, 40998078,91653990,201842383,438312534,939439674, 1988944070,4162521165,8617025112,17655688602, 35823617658,72015578091,143499705550,283544586489, 555779906772] |