n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 65 |
4 | 190 |
5 | 511 |
6 | 1295 |
7 | 3130 |
8 | 7285 |
9 | 16435 |
10 | 36122 |
11 | 77645 |
12 | 163730 |
13 | 339535 |
14 | 693835 |
15 | 1399478 |
16 | 2790100 |
17 | 5504650 |
18 | 10758050 |
19 | 20845300 |
20 | 40075630 |
21 | 76495450 |
22 | 145052300 |
23 | 273381350 |
24 | 512347975 |
25 | 955187033 |
26 | 1772132390 |
27 | 3272875935 |
28 | 6018885570 |
29 | 11024814945 |
30 | 20118711993 |
[1,5,20,65,190,511,1295,3130,7285,16435,36122, 77645,163730,339535,693835,1399478,2790100, 5504650,10758050,20845300,40075630,76495450, 145052300,273381350,512347975,955187033, 1772132390,3272875935,6018885570,11024814945, 20118711993] |