n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 110 |
3 | 545 |
4 | 2120 |
5 | 7043 |
6 | 20965 |
7 | 57560 |
8 | 148545 |
9 | 365045 |
10 | 862224 |
11 | 1970905 |
12 | 4382820 |
13 | 9520315 |
14 | 20265665 |
15 | 42385132 |
16 | 87284120 |
17 | 177293730 |
18 | 355738710 |
19 | 705980760 |
20 | 1387213926 |
21 | 2701362950 |
22 | 5217448800 |
23 | 10001654350 |
[1,15,110,545,2120,7043,20965,57560,148545,365045, 862224,1970905,4382820,9520315,20265665,42385132, 87284120,177293730,355738710,705980760,1387213926, 2701362950,5217448800,10001654350] |