n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 126 |
3 | 2310 |
4 | 47250 |
5 | 1027026 |
6 | 23207184 |
7 | 538748496 |
8 | 12757863690 |
9 | 306752696250 |
10 | 7465133615940 |
11 | 183458150153460 |
12 | 4545211223957040 |
13 | 113378500045162800 |
14 | 2844670649392440000 |
15 | 71731904712206892480 |
16 | 1816739665054871280570 |
17 | 46189610653753780435530 |
18 | 1178358502858339948645500 |
[1,9,126,2310,47250,1027026,23207184,538748496, 12757863690,306752696250,7465133615940, 183458150153460,4545211223957040, 113378500045162800,2844670649392440000, 71731904712206892480,1816739665054871280570, 46189610653753780435530,1178358502858339948645500] |