n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 5 |
5 | 21 |
6 | 61 |
7 | 141 |
8 | 309 |
9 | 766 |
10 | 2191 |
11 | 6436 |
12 | 18041 |
13 | 48348 |
14 | 128311 |
15 | 347166 |
16 | 960197 |
17 | 2674883 |
18 | 7413514 |
19 | 20411986 |
20 | 56130675 |
21 | 154907229 |
22 | 429349768 |
23 | 1192532452 |
24 | 3312339849 |
25 | 9196063371 |
26 | 25538113056 |
27 | 70994900341 |
28 | 197595884071 |
29 | 550414483911 |
30 | 1533911418946 |
[1,1,1,1,5,21,61,141,309,766,2191,6436,18041, 48348,128311,347166,960197,2674883,7413514, 20411986,56130675,154907229,429349768,1192532452, 3312339849,9196063371,25538113056,70994900341, 197595884071,550414483911,1533911418946] |