n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 18 |
4 | 58 |
5 | 198 |
6 | 699 |
7 | 2555 |
8 | 9496 |
9 | 35858 |
10 | 137357 |
11 | 532718 |
12 | 2088905 |
13 | 8261370 |
14 | 32902004 |
15 | 131899705 |
16 | 531966574 |
17 | 2157304467 |
18 | 8790642741 |
19 | 35967722498 |
20 | 147723568543 |
21 | 608879673427 |
22 | 2517980169752 |
23 | 10444486214272 |
24 | 43440861244434 |
25 | 181131270913433 |
26 | 757027164305121 |
27 | 3170993736654692 |
[1,2,6,18,58,198,699,2555,9496,35858,137357, 532718,2088905,8261370,32902004,131899705, 531966574,2157304467,8790642741,35967722498, 147723568543,608879673427,2517980169752, 10444486214272,43440861244434,181131270913433, 757027164305121,3170993736654692] |