n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 16 |
4 | 45 |
5 | 120 |
6 | 333 |
7 | 928 |
8 | 2613 |
9 | 7400 |
10 | 21053 |
11 | 60080 |
12 | 171845 |
13 | 492280 |
14 | 1411789 |
15 | 4051904 |
16 | 11635413 |
17 | 33424648 |
18 | 96042845 |
19 | 276020944 |
20 | 793366629 |
21 | 2280573208 |
22 | 6556026349 |
23 | 18847591392 |
24 | 54185601013 |
25 | 155783294760 |
26 | 447882509949 |
[1,7,16,45,120,333,928,2613,7400,21053,60080, 171845,492280,1411789,4051904,11635413,33424648, 96042845,276020944,793366629,2280573208, 6556026349,18847591392,54185601013,155783294760, 447882509949] |