n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 69 |
5 | 239 |
6 | 888 |
7 | 3283 |
8 | 12323 |
9 | 46434 |
10 | 177690 |
11 | 675990 |
12 | 2602449 |
13 | 10024005 |
14 | 38728070 |
15 | 149933270 |
16 | 582864650 |
17 | 2263804898 |
18 | 8824622593 |
19 | 34428415653 |
20 | 134461239120 |
21 | 525789194496 |
22 | 2059338838290 |
23 | 8065991665054 |
24 | 31641263512192 |
25 | 124204017286748 |
26 | 487810345489419 |
27 | 1917359731005276 |
[1,2,6,19,69,239,888,3283,12323,46434,177690, 675990,2602449,10024005,38728070,149933270, 582864650,2263804898,8824622593,34428415653, 134461239120,525789194496,2059338838290, 8065991665054,31641263512192,124204017286748, 487810345489419,1917359731005276] |