n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 281 |
3 | 3472 |
4 | 40509 |
5 | 459564 |
6 | 5139121 |
7 | 57034088 |
8 | 630398021 |
9 | 6952517572 |
10 | 76586531385 |
11 | 843104877888 |
12 | 9278071860877 |
13 | 102082299710684 |
14 | 1123046352296513 |
15 | 12354356208201112 |
16 | 135902996287980117 |
17 | 1494963427154650740 |
18 | 16444780506622899145 |
19 | 180893682420383385200 |
[1,20,281,3472,40509,459564,5139121,57034088, 630398021,6952517572,76586531385,843104877888, 9278071860877,102082299710684,1123046352296513, 12354356208201112,135902996287980117, 1494963427154650740,16444780506622899145, 180893682420383385200] |