n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 20 |
3 | 169 |
4 | 1667 |
5 | 18084 |
6 | 208960 |
7 | 2527074 |
8 | 31630390 |
9 | 406680465 |
10 | 5342750699 |
11 | 71442850111 |
12 | 969548468960 |
13 | 13323571588607 |
14 | 185072895183632 |
15 | 2594890728951909 |
16 | 36681505784903758 |
17 | 522291180086851188 |
18 | 7484621370716999785 |
19 | 107876522368295972285 |
20 | 1562916545414144667559 |
[1,3,20,169,1667,18084,208960,2527074,31630390, 406680465,5342750699,71442850111,969548468960, 13323571588607,185072895183632,2594890728951909, 36681505784903758,522291180086851188, 7484621370716999785,107876522368295972285, 1562916545414144667559] |