n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 93 |
4 | 645 |
5 | 4791 |
6 | 37275 |
7 | 299865 |
8 | 2474025 |
9 | 20819307 |
10 | 178003815 |
11 | 1541918901 |
12 | 13503125805 |
13 | 119352115551 |
14 | 1063366539315 |
15 | 9539785668657 |
16 | 86104685123025 |
17 | 781343125570515 |
18 | 7124072211203775 |
19 | 65233526296899981 |
20 | 599633539433039445 |
21 | 5531156299278726663 |
[1,3,15,93,645,4791,37275,299865,2474025,20819307, 178003815,1541918901,13503125805,119352115551, 1063366539315,9539785668657,86104685123025, 781343125570515,7124072211203775, 65233526296899981,599633539433039445, 5531156299278726663] |