n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 15 |
6 | 36 |
7 | 90 |
8 | 225 |
9 | 578 |
10 | 1492 |
11 | 3901 |
12 | 10278 |
13 | 27313 |
14 | 73042 |
15 | 196585 |
16 | 531847 |
17 | 1445991 |
18 | 3948282 |
19 | 10823524 |
20 | 29776129 |
21 | 82183115 |
22 | 227501127 |
23 | 631494797 |
24 | 1757297207 |
25 | 4901491697 |
26 | 13700742034 |
27 | 38373104938 |
28 | 107675540083 |
29 | 302664162746 |
30 | 852138516321 |
31 | 2402817160804 |
[1,1,1,3,6,15,36,90,225,578,1492,3901,10278,27313, 73042,196585,531847,1445991,3948282,10823524, 29776129,82183115,227501127,631494797,1757297207, 4901491697,13700742034,38373104938,107675540083, 302664162746,852138516321,2402817160804] |