n | a(n) |
---|---|
1 | 12 |
2 | 144 |
3 | 396 |
4 | 2460 |
5 | 9216 |
6 | 46956 |
7 | 196812 |
8 | 932688 |
9 | 4086060 |
10 | 18819228 |
11 | 83939328 |
12 | 382160076 |
13 | 1717133964 |
14 | 7780911120 |
15 | 35067371724 |
16 | 158593617564 |
17 | 715647771648 |
18 | 3233959733292 |
19 | 14600607874380 |
20 | 65957362026192 |
21 | 297845692391532 |
[12,144,396,2460,9216,46956,196812,932688,4086060, 18819228,83939328,382160076,1717133964,7780911120, 35067371724,158593617564,715647771648, 3233959733292,14600607874380,65957362026192, 297845692391532] |