n | a(n) |
---|---|
0 | 1 |
1 | 30 |
2 | 495 |
3 | 5890 |
4 | 56265 |
5 | 456786 |
6 | 3263990 |
7 | 21017040 |
8 | 124018290 |
9 | 679118550 |
10 | 3484681077 |
11 | 16884109080 |
12 | 77731521980 |
13 | 341784289770 |
14 | 1441489548195 |
15 | 5852747363518 |
16 | 22948550618400 |
17 | 87131200662540 |
18 | 321100847115950 |
19 | 1150962640399770 |
20 | 4020058004480100 |
21 | 13704611801774340 |
[1,30,495,5890,56265,456786,3263990,21017040, 124018290,679118550,3484681077,16884109080, 77731521980,341784289770,1441489548195, 5852747363518,22948550618400,87131200662540, 321100847115950,1150962640399770,4020058004480100, 13704611801774340] |