n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 75 |
6 | 284 |
7 | 1109 |
8 | 4470 |
9 | 18453 |
10 | 77433 |
11 | 329126 |
12 | 1415834 |
13 | 6149299 |
14 | 26931302 |
15 | 118780241 |
16 | 527010199 |
17 | 2350740211 |
18 | 10534962936 |
19 | 47408681317 |
20 | 214136796301 |
21 | 970426128408 |
22 | 4410950701961 |
23 | 20104046171859 |
24 | 91856203336505 |
25 | 420644431533937 |
26 | 1930293373533896 |
27 | 8874862002582146 |
28 | 40875930281689623 |
[1,1,2,6,21,75,284,1109,4470,18453,77433,329126, 1415834,6149299,26931302,118780241,527010199, 2350740211,10534962936,47408681317,214136796301, 970426128408,4410950701961,20104046171859, 91856203336505,420644431533937,1930293373533896, 8874862002582146,40875930281689623] |