n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 110 |
4 | 365 |
5 | 1001 |
6 | 2520 |
7 | 5720 |
8 | 12190 |
9 | 24310 |
10 | 46252 |
11 | 83980 |
12 | 147070 |
13 | 248710 |
14 | 408760 |
15 | 653752 |
16 | 1021735 |
17 | 1562275 |
18 | 2343770 |
19 | 3453450 |
20 | 5008003 |
21 | 7153575 |
22 | 10080720 |
23 | 14024400 |
24 | 19284460 |
25 | 26225628 |
26 | 35304920 |
27 | 47071640 |
[1,5,30,110,365,1001,2520,5720,12190,24310,46252, 83980,147070,248710,408760,653752,1021735,1562275, 2343770,3453450,5008003,7153575,10080720,14024400, 19284460,26225628,35304920,47071640] |