n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 135 |
3 | 660 |
4 | 2475 |
5 | 7722 |
6 | 21021 |
7 | 51480 |
8 | 115830 |
9 | 243100 |
10 | 481338 |
11 | 906984 |
12 | 1637610 |
13 | 2848860 |
14 | 4796550 |
15 | 7845024 |
16 | 12503007 |
17 | 19468350 |
18 | 29683225 |
19 | 44401500 |
20 | 65270205 |
21 | 94427190 |
22 | 134617275 |
23 | 189329400 |
24 | 262957500 |
25 | 360988056 |
26 | 490217508 |
27 | 659002960 |
28 | 877549860 |
29 | 1158240600 |
[1,18,135,660,2475,7722,21021,51480,115830,243100, 481338,906984,1637610,2848860,4796550,7845024, 12503007,19468350,29683225,44401500,65270205, 94427190,134617275,189329400,262957500,360988056, 490217508,659002960,877549860,1158240600] |