n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 5 |
4 | 13 |
5 | 40 |
6 | 128 |
7 | 457 |
8 | 1660 |
9 | 6308 |
10 | 24409 |
11 | 96363 |
12 | 385535 |
13 | 1561706 |
14 | 6387135 |
15 | 26347199 |
16 | 109471366 |
17 | 457758461 |
18 | 1924845582 |
19 | 8134171456 |
20 | 34526723986 |
21 | 147139513066 |
22 | 629314845284 |
23 | 2700401538933 |
24 | 11622130671430 |
[2,2,5,13,40,128,457,1660,6308,24409,96363,385535, 1561706,6387135,26347199,109471366,457758461, 1924845582,8134171456,34526723986,147139513066, 629314845284,2700401538933,11622130671430] |