n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 8 |
6 | 30 |
7 | 145 |
8 | 1028 |
9 | 12320 |
10 | 274806 |
11 | 12007355 |
12 | 1019030239 |
13 | 165091859656 |
14 | 50502058492266 |
15 | 29054157815353374 |
16 | 31426486309136279775 |
17 | 64001015806929213894372 |
18 | 245935864212056913811759534 |
19 | 1787577725208700551275529005084 |
[0,0,1,1,3,8,30,145,1028,12320,274806,12007355, 1019030239,165091859656,50502058492266, 29054157815353374,31426486309136279775, 64001015806929213894372, 245935864212056913811759534, 1787577725208700551275529005084] |