n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 14 |
6 | 42 |
7 | 133 |
8 | 442 |
9 | 1537 |
10 | 5583 |
11 | 21165 |
12 | 83707 |
13 | 345324 |
14 | 1485687 |
15 | 6663354 |
16 | 31134078 |
17 | 151408319 |
18 | 765462514 |
19 | 4017644518 |
20 | 21860398111 |
21 | 123120413119 |
22 | 716701884408 |
23 | 4305828784896 |
24 | 26661920519485 |
25 | 169937265101628 |
26 | 1113616036893636 |
27 | 7494786443901137 |
[1,1,1,2,5,14,42,133,442,1537,5583,21165,83707, 345324,1485687,6663354,31134078,151408319, 765462514,4017644518,21860398111,123120413119, 716701884408,4305828784896,26661920519485, 169937265101628,1113616036893636,7494786443901137] |