n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 165 |
3 | 880 |
4 | 3575 |
5 | 12012 |
6 | 35035 |
7 | 91520 |
8 | 218790 |
9 | 486200 |
10 | 1016158 |
11 | 2015520 |
12 | 3821090 |
13 | 6963880 |
14 | 12257850 |
15 | 20920064 |
16 | 34730575 |
17 | 56241900 |
18 | 89049675 |
19 | 138138000 |
20 | 210315105 |
21 | 314757300 |
22 | 463681725 |
23 | 673171200 |
24 | 964177500 |
25 | 1363732656 |
26 | 1906401420 |
27 | 2636011840 |
28 | 3607704980 |
[1,20,165,880,3575,12012,35035,91520,218790, 486200,1016158,2015520,3821090,6963880,12257850, 20920064,34730575,56241900,89049675,138138000, 210315105,314757300,463681725,673171200,964177500, 1363732656,1906401420,2636011840,3607704980] |