n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 10 |
5 | 27 |
6 | 79 |
7 | 238 |
8 | 736 |
9 | 2322 |
10 | 7445 |
11 | 24190 |
12 | 79470 |
13 | 263534 |
14 | 880966 |
15 | 2965576 |
16 | 10044096 |
17 | 34202268 |
18 | 117026156 |
19 | 402139968 |
20 | 1387243056 |
21 | 4802307553 |
22 | 16677543678 |
23 | 58087052893 |
24 | 202855613896 |
25 | 710171007580 |
26 | 2491870287323 |
[1,1,1,4,10,27,79,238,736,2322,7445,24190,79470, 263534,880966,2965576,10044096,34202268,117026156, 402139968,1387243056,4802307553,16677543678, 58087052893,202855613896,710171007580, 2491870287323] |