n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 8 |
3 | 57 |
4 | 407 |
5 | 2906 |
6 | 20749 |
7 | 148149 |
8 | 1057792 |
9 | 7552693 |
10 | 53926643 |
11 | 385039194 |
12 | 2749201001 |
13 | 19629446201 |
14 | 140155324408 |
15 | 1000716717057 |
16 | 7145172343807 |
17 | 51016923123706 |
18 | 364263634209749 |
19 | 2600862362591949 |
20 | 18570300172353392 |
[1,1,8,57,407,2906,20749,148149,1057792,7552693, 53926643,385039194,2749201001,19629446201, 140155324408,1000716717057,7145172343807, 51016923123706,364263634209749,2600862362591949, 18570300172353392] |