n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 315 |
4 | 2457 |
5 | 19656 |
6 | 160056 |
7 | 1320462 |
8 | 11003850 |
9 | 92432340 |
10 | 781473420 |
11 | 6642524070 |
12 | 56716936290 |
13 | 486145168200 |
14 | 4180848446520 |
15 | 36059817851235 |
16 | 311811366125385 |
17 | 2702365173086670 |
18 | 23467908082068450 |
19 | 204170800313995515 |
20 | 1779202688450532345 |
21 | 15527587099204645920 |
[1,6,42,315,2457,19656,160056,1320462,11003850, 92432340,781473420,6642524070,56716936290, 486145168200,4180848446520,36059817851235, 311811366125385,2702365173086670, 23467908082068450,204170800313995515, 1779202688450532345,15527587099204645920] |