n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 5 |
7 | 9 |
8 | 22 |
9 | 60 |
10 | 164 |
11 | 494 |
12 | 1624 |
13 | 5602 |
14 | 20600 |
15 | 79813 |
16 | 323806 |
17 | 1371025 |
18 | 6034105 |
19 | 27513424 |
20 | 129641411 |
21 | 629862824 |
22 | 3149541908 |
23 | 16183100922 |
24 | 85328280263 |
25 | 461123500894 |
26 | 2551342936264 |
27 | 14438734591483 |
28 | 83506198920054 |
29 | 493163726073210 |
30 | 2971858162771887 |
[1,0,0,1,1,2,5,9,22,60,164,494,1624,5602,20600, 79813,323806,1371025,6034105,27513424,129641411, 629862824,3149541908,16183100922,85328280263, 461123500894,2551342936264,14438734591483, 83506198920054,493163726073210,2971858162771887] |