n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 18 |
5 | 73 |
6 | 338 |
7 | 1656 |
8 | 8512 |
9 | 45207 |
10 | 246448 |
11 | 1371535 |
12 | 7764392 |
13 | 44585180 |
14 | 259140928 |
15 | 1521967986 |
16 | 9020077206 |
17 | 53885028921 |
18 | 324176252022 |
19 | 1962530559999 |
20 | 11947926290396 |
21 | 73108804084505 |
22 | 449408984811980 |
23 | 2774152288318052 |
24 | 17190155366056138 |
25 | 106894140685782646 |
[1,1,2,5,18,73,338,1656,8512,45207,246448,1371535, 7764392,44585180,259140928,1521967986,9020077206, 53885028921,324176252022,1962530559999, 11947926290396,73108804084505,449408984811980, 2774152288318052,17190155366056138, 106894140685782646] |