n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 45 |
3 | 630 |
4 | 8925 |
5 | 128898 |
6 | 1891890 |
7 | 28113228 |
8 | 421717725 |
9 | 6372696330 |
10 | 96865261350 |
11 | 1479397776948 |
12 | 22684103302770 |
13 | 348986220258900 |
14 | 5384358887026500 |
15 | 83278084352019480 |
16 | 1290810308357922525 |
17 | 20045524792117559130 |
18 | 311819274557663622750 |
19 | 4857816066846093281700 |
[0,3,45,630,8925,128898,1891890,28113228, 421717725,6372696330,96865261350,1479397776948, 22684103302770,348986220258900,5384358887026500, 83278084352019480,1290810308357922525, 20045524792117559130,311819274557663622750, 4857816066846093281700] |