n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 23 |
5 | 66 |
6 | 209 |
7 | 722 |
8 | 2697 |
9 | 10825 |
10 | 46429 |
11 | 211799 |
12 | 1023304 |
13 | 5217048 |
14 | 27974458 |
15 | 157310519 |
16 | 925326848 |
17 | 5680341820 |
18 | 36315837763 |
19 | 241348819913 |
20 | 1664484383610 |
21 | 11893800649953 |
22 | 87931422125632 |
23 | 671699288516773 |
24 | 5295185052962371 |
25 | 43029828113547685 |
[1,2,4,9,23,66,209,722,2697,10825,46429,211799, 1023304,5217048,27974458,157310519,925326848, 5680341820,36315837763,241348819913,1664484383610, 11893800649953,87931422125632,671699288516773, 5295185052962371,43029828113547685] |