n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 148 |
4 | 755 |
5 | 4044 |
6 | 22841 |
7 | 136056 |
8 | 853452 |
9 | 5625950 |
10 | 38885297 |
11 | 281170080 |
12 | 2122313505 |
13 | 16688829122 |
14 | 136457754030 |
15 | 1158155642512 |
16 | 10186602918035 |
17 | 92711977180164 |
18 | 871936904575985 |
19 | 8462913158427580 |
20 | 84668764368102012 |
21 | 872196382566014506 |
22 | 9241557859113581689 |
[1,6,30,148,755,4044,22841,136056,853452,5625950, 38885297,281170080,2122313505,16688829122, 136457754030,1158155642512,10186602918035, 92711977180164,871936904575985,8462913158427580, 84668764368102012,872196382566014506, 9241557859113581689] |