n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 105 |
3 | 532 |
4 | 2241 |
5 | 8361 |
6 | 28610 |
7 | 91740 |
8 | 279624 |
9 | 818272 |
10 | 2315712 |
11 | 6372480 |
12 | 17123840 |
13 | 45082368 |
14 | 116596224 |
15 | 296879104 |
16 | 745543680 |
17 | 1849344000 |
18 | 4536958976 |
19 | 11020075008 |
20 | 26526547968 |
21 | 63329075200 |
22 | 150057123840 |
[1,15,105,532,2241,8361,28610,91740,279624,818272, 2315712,6372480,17123840,45082368,116596224, 296879104,745543680,1849344000,4536958976, 11020075008,26526547968,63329075200,150057123840] |