n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 175 |
3 | 980 |
4 | 4116 |
5 | 14112 |
6 | 41580 |
7 | 108900 |
8 | 259545 |
9 | 572572 |
10 | 1184183 |
11 | 2318680 |
12 | 4331600 |
13 | 7768320 |
14 | 13441968 |
15 | 22535064 |
16 | 36729945 |
17 | 58373700 |
18 | 90684055 |
19 | 138003404 |
20 | 206108980 |
21 | 302588000 |
22 | 437287500 |
23 | 622849500 |
24 | 875343105 |
25 | 1215006156 |
26 | 1667110095 |
[1,20,175,980,4116,14112,41580,108900,259545, 572572,1184183,2318680,4331600,7768320,13441968, 22535064,36729945,58373700,90684055,138003404, 206108980,302588000,437287500,622849500,875343105, 1215006156,1667110095] |