n | a(n) |
---|---|
3 | 0 |
4 | 1 |
5 | 5 |
6 | 31 |
7 | 227 |
8 | 1909 |
9 | 18089 |
10 | 190435 |
11 | 2203319 |
12 | 27772873 |
13 | 378673901 |
14 | 5551390471 |
15 | 87057596075 |
16 | 1453986832381 |
17 | 25762467303377 |
18 | 482626240281739 |
19 | 9530573107600319 |
20 | 197850855756232465 |
21 | 4307357140602486869 |
22 | 98125321641110663023 |
23 | 2334414826276390013171 |
[0,1,5,31,227,1909,18089,190435,2203319,27772873, 378673901,5551390471,87057596075,1453986832381, 25762467303377,482626240281739,9530573107600319, 197850855756232465,4307357140602486869, 98125321641110663023,2334414826276390013171] |