n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 5 |
8 | 19 |
9 | 68 |
10 | 240 |
11 | 839 |
12 | 2911 |
13 | 10054 |
14 | 34641 |
15 | 119203 |
16 | 409893 |
17 | 1408873 |
18 | 4841373 |
19 | 16634350 |
20 | 57149111 |
21 | 196333312 |
22 | 674477710 |
23 | 2317047808 |
24 | 7959739375 |
25 | 27343914410 |
26 | 93933688630 |
27 | 322686958885 |
28 | 1108513737048 |
29 | 3808031504891 |
[0,0,0,0,0,1,5,19,68,240,839,2911,10054,34641, 119203,409893,1408873,4841373,16634350,57149111, 196333312,674477710,2317047808,7959739375, 27343914410,93933688630,322686958885, 1108513737048,3808031504891] |