n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 15 |
3 | 130 |
4 | 1263 |
5 | 13210 |
6 | 145254 |
7 | 1655566 |
8 | 19385489 |
9 | 231803136 |
10 | 2818714210 |
11 | 34749228048 |
12 | 433317651224 |
13 | 5455934825956 |
14 | 69267925684377 |
15 | 885756704750960 |
16 | 11397912218979769 |
17 | 147483397060856046 |
18 | 1917785255491649284 |
19 | 25047838828467708506 |
20 | 328444729414573179950 |
[1,2,15,130,1263,13210,145254,1655566,19385489, 231803136,2818714210,34749228048,433317651224, 5455934825956,69267925684377,885756704750960, 11397912218979769,147483397060856046, 1917785255491649284,25047838828467708506, 328444729414573179950] |