n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 3 |
7 | 3 |
8 | 9 |
9 | 15 |
10 | 38 |
11 | 73 |
12 | 174 |
13 | 380 |
14 | 915 |
15 | 2124 |
16 | 5134 |
17 | 12281 |
18 | 30010 |
19 | 73401 |
20 | 181835 |
21 | 452165 |
22 | 1133252 |
23 | 2851710 |
24 | 7215262 |
25 | 18326528 |
26 | 46750268 |
27 | 119687146 |
28 | 307528889 |
29 | 792716193 |
30 | 2049703887 |
31 | 5314775856 |
32 | 13817638615 |
33 | 36012395538 |
[0,0,1,0,1,1,3,3,9,15,38,73,174,380,915,2124,5134, 12281,30010,73401,181835,452165,1133252,2851710, 7215262,18326528,46750268,119687146,307528889, 792716193,2049703887,5314775856,13817638615, 36012395538] |