n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 60 |
5 | 251 |
6 | 1120 |
7 | 5034 |
8 | 23167 |
9 | 107491 |
10 | 504444 |
11 | 2382474 |
12 | 11326009 |
13 | 54091015 |
14 | 259422990 |
15 | 1248388483 |
16 | 6025296992 |
17 | 29153344429 |
18 | 141368541183 |
19 | 686821433084 |
20 | 3342472006964 |
21 | 16290717857322 |
22 | 79504766682773 |
23 | 388478084327045 |
24 | 1900247753858534 |
25 | 9304229885789657 |
26 | 45597320486134219 |
27 | 223642198438153404 |
[1,1,4,14,60,251,1120,5034,23167,107491,504444, 2382474,11326009,54091015,259422990,1248388483, 6025296992,29153344429,141368541183,686821433084, 3342472006964,16290717857322,79504766682773, 388478084327045,1900247753858534,9304229885789657, 45597320486134219,223642198438153404] |