n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 21 |
3 | 56 |
4 | 126 |
5 | 252 |
6 | 463 |
7 | 804 |
8 | 1365 |
9 | 2366 |
10 | 4368 |
11 | 8736 |
12 | 18565 |
13 | 40410 |
14 | 87381 |
15 | 184604 |
16 | 379050 |
17 | 758100 |
18 | 1486675 |
19 | 2884776 |
20 | 5592405 |
21 | 10919090 |
22 | 21572460 |
23 | 43144920 |
24 | 87087001 |
25 | 176565486 |
26 | 357913941 |
27 | 723002336 |
28 | 1453179126 |
29 | 2906358252 |
[1,6,21,56,126,252,463,804,1365,2366,4368,8736, 18565,40410,87381,184604,379050,758100,1486675, 2884776,5592405,10919090,21572460,43144920, 87087001,176565486,357913941,723002336,1453179126, 2906358252] |