n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 10 |
4 | 75 |
5 | 728 |
6 | 8526 |
7 | 115764 |
8 | 1776060 |
9 | 30240210 |
10 | 563870450 |
11 | 11397261720 |
12 | 247700513242 |
13 | 5750374629244 |
14 | 141819106313800 |
15 | 3698639651089800 |
16 | 101603353693132215 |
17 | 2929908721122796680 |
18 | 88427704298354261610 |
19 | 2785943404258558905900 |
20 | 91410200883108291556680 |
21 | 3117102657076175159955420 |
[1,2,10,75,728,8526,115764,1776060,30240210, 563870450,11397261720,247700513242,5750374629244, 141819106313800,3698639651089800, 101603353693132215,2929908721122796680, 88427704298354261610,2785943404258558905900, 91410200883108291556680,3117102657076175159955420] |