n | a(n) |
---|---|
1 | 6 |
2 | 12 |
3 | 54 |
4 | 96 |
5 | 390 |
6 | 684 |
7 | 2742 |
8 | 4800 |
9 | 19206 |
10 | 33612 |
11 | 134454 |
12 | 235296 |
13 | 941190 |
14 | 1647084 |
15 | 6588342 |
16 | 11529600 |
17 | 46118406 |
18 | 80707212 |
19 | 322828854 |
20 | 564950496 |
21 | 2259801990 |
22 | 3954653484 |
23 | 15818613942 |
24 | 27682574400 |
25 | 110730297606 |
26 | 193778020812 |
27 | 775112083254 |
28 | 1356446145696 |
[6,12,54,96,390,684,2742,4800,19206,33612,134454, 235296,941190,1647084,6588342,11529600,46118406, 80707212,322828854,564950496,2259801990, 3954653484,15818613942,27682574400,110730297606, 193778020812,775112083254,1356446145696] |