n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 27 |
3 | 98 |
4 | 315 |
5 | 913 |
6 | 2462 |
7 | 6237 |
8 | 15035 |
9 | 34705 |
10 | 77231 |
11 | 166364 |
12 | 348326 |
13 | 710869 |
14 | 1417900 |
15 | 2769730 |
16 | 5308732 |
17 | 9999185 |
18 | 18533944 |
19 | 33845975 |
20 | 60960273 |
21 | 108389248 |
22 | 190410133 |
23 | 330733733 |
24 | 568388100 |
25 | 967054374 |
26 | 1629808139 |
27 | 2722189979 |
[1,6,27,98,315,913,2462,6237,15035,34705,77231, 166364,348326,710869,1417900,2769730,5308732, 9999185,18533944,33845975,60960273,108389248, 190410133,330733733,568388100,967054374, 1629808139,2722189979] |