n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 10 |
3 | 40 |
4 | 110 |
5 | 430 |
6 | 1420 |
7 | 5720 |
8 | 21340 |
9 | 89980 |
10 | 367400 |
11 | 1627120 |
12 | 7138120 |
13 | 33172040 |
14 | 154520080 |
15 | 751616800 |
16 | 3687498320 |
17 | 18719834320 |
18 | 96157299040 |
19 | 507993654080 |
20 | 2719611532000 |
21 | 14911459229920 |
22 | 82901747529920 |
23 | 470599687507840 |
24 | 2708946870815680 |
[1,5,10,40,110,430,1420,5720,21340,89980,367400, 1627120,7138120,33172040,154520080,751616800, 3687498320,18719834320,96157299040,507993654080, 2719611532000,14911459229920,82901747529920, 470599687507840,2708946870815680] |