n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 5 |
6 | 15 |
7 | 35 |
8 | 70 |
9 | 127 |
10 | 220 |
11 | 385 |
12 | 715 |
13 | 1430 |
14 | 3004 |
15 | 6385 |
16 | 13380 |
17 | 27370 |
18 | 54740 |
19 | 107883 |
20 | 211585 |
21 | 416405 |
22 | 826045 |
23 | 1652090 |
24 | 3321891 |
25 | 6690150 |
26 | 13455325 |
27 | 26985675 |
28 | 53971350 |
29 | 107746282 |
30 | 214978335 |
31 | 429124630 |
32 | 857417220 |
33 | 1714834440 |
34 | 3431847189 |
[0,0,0,0,1,5,15,35,70,127,220,385,715,1430,3004, 6385,13380,27370,54740,107883,211585,416405, 826045,1652090,3321891,6690150,13455325,26985675, 53971350,107746282,214978335,429124630,857417220, 1714834440,3431847189] |