n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 2676 |
4 | 101118 |
5 | 1644784 |
6 | 16044996 |
7 | 110148864 |
8 | 584716268 |
9 | 2549726784 |
10 | 9515920164 |
11 | 31314134428 |
12 | 92917720104 |
13 | 252775518960 |
14 | 638328487880 |
15 | 1511740834560 |
16 | 3387163064214 |
17 | 7228599229760 |
18 | 14768913424614 |
19 | 29023937463900 |
20 | 55107648867544 |
21 | 101434033397472 |
[1,0,2,2676,101118,1644784,16044996,110148864, 584716268,2549726784,9515920164,31314134428, 92917720104,252775518960,638328487880, 1511740834560,3387163064214,7228599229760, 14768913424614,29023937463900,55107648867544, 101434033397472] |