n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 22 |
4 | 154 |
5 | 1304 |
6 | 12915 |
7 | 146115 |
8 | 1855570 |
9 | 26097835 |
10 | 402215465 |
11 | 6734414075 |
12 | 121629173423 |
13 | 2355470737637 |
14 | 48664218965021 |
15 | 1067895971109199 |
16 | 24795678053493443 |
17 | 607144847919796830 |
18 | 15630954703539323090 |
19 | 421990078975569031642 |
20 | 11918095123121138408128 |
[1,1,4,22,154,1304,12915,146115,1855570,26097835, 402215465,6734414075,121629173423,2355470737637, 48664218965021,1067895971109199,24795678053493443, 607144847919796830,15630954703539323090, 421990078975569031642,11918095123121138408128] |