n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 565 |
4 | 18915 |
5 | 177032 |
6 | 1008910 |
7 | 3899879 |
8 | 12690548 |
9 | 34438889 |
10 | 83808824 |
11 | 185013729 |
12 | 382012409 |
13 | 734818441 |
14 | 1353502989 |
15 | 2375969079 |
16 | 4018726844 |
17 | 6574593263 |
18 | 10469428612 |
19 | 16204936025 |
20 | 24566356693 |
21 | 36412811648 |
22 | 53015003930 |
[0,3,565,18915,177032,1008910,3899879,12690548, 34438889,83808824,185013729,382012409,734818441, 1353502989,2375969079,4018726844,6574593263, 10469428612,16204936025,24566356693,36412811648, 53015003930] |