n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 7 |
6 | 35 |
7 | 155 |
8 | 650 |
9 | 2652 |
10 | 10660 |
11 | 42484 |
12 | 168454 |
13 | 665874 |
14 | 2627130 |
15 | 10353290 |
16 | 40775045 |
17 | 160534895 |
18 | 631970495 |
19 | 2487938015 |
20 | 9795810125 |
21 | 38576953505 |
22 | 151957215305 |
23 | 598732526105 |
24 | 2359771876175 |
25 | 9303298456451 |
26 | 36688955738099 |
27 | 144732209103699 |
28 | 571117191135799 |
[0,0,0,0,1,7,35,155,650,2652,10660,42484,168454, 665874,2627130,10353290,40775045,160534895, 631970495,2487938015,9795810125,38576953505, 151957215305,598732526105,2359771876175, 9303298456451,36688955738099,144732209103699, 571117191135799] |