n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 18 |
3 | 115 |
4 | 1076 |
5 | 13749 |
6 | 223342 |
7 | 4437115 |
8 | 105308472 |
9 | 2930229721 |
10 | 94110395546 |
11 | 3444510650343 |
12 | 142161931150564 |
13 | 6557368148307253 |
14 | 335460464343013494 |
15 | 18907437932151629899 |
16 | 1167279375125285092592 |
17 | 78529603970775837111729 |
18 | 5730854443905658384812466 |
19 | 451803953552256670477653679 |
20 | 38337003901469883140928003036 |
21 | 3489532046271886600931347767373 |
[1,4,18,115,1076,13749,223342,4437115,105308472, 2930229721,94110395546,3444510650343, 142161931150564,6557368148307253, 335460464343013494,18907437932151629899, 1167279375125285092592,78529603970775837111729, 5730854443905658384812466, 451803953552256670477653679, 38337003901469883140928003036, 3489532046271886600931347767373] |