n | a(n) |
---|---|
0 | 1 |
1 | 90 |
2 | 2070 |
3 | 22530 |
4 | 151560 |
5 | 731502 |
6 | 2777370 |
7 | 8809110 |
8 | 24314490 |
9 | 60110030 |
10 | 135916002 |
11 | 285510150 |
12 | 563873400 |
13 | 1056789450 |
14 | 1893408750 |
15 | 3262336002 |
16 | 5431848930 |
17 | 8774904690 |
18 | 13799638910 |
19 | 21186110970 |
20 | 31830097752 |
21 | 46894786710 |
[1,90,2070,22530,151560,731502,2777370,8809110, 24314490,60110030,135916002,285510150,563873400, 1056789450,1893408750,3262336002,5431848930, 8774904690,13799638910,21186110970,31830097752, 46894786710] |