n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 22 |
3 | 157 |
4 | 1342 |
5 | 12694 |
6 | 126601 |
7 | 1301353 |
8 | 13647622 |
9 | 145280776 |
10 | 1564974682 |
11 | 17022150688 |
12 | 186647326849 |
13 | 2060538384454 |
14 | 22880172406939 |
15 | 255336518921572 |
16 | 2861956399934038 |
17 | 32201882791307904 |
18 | 363561893114484868 |
19 | 4117138703073839926 |
20 | 46751784944876067562 |
[1,4,22,157,1342,12694,126601,1301353,13647622, 145280776,1564974682,17022150688,186647326849, 2060538384454,22880172406939,255336518921572, 2861956399934038,32201882791307904, 363561893114484868,4117138703073839926, 46751784944876067562] |