n | a(n) |
---|---|
1 | 1 |
2 | 69 |
3 | 1064 |
4 | 8736 |
5 | 49350 |
6 | 216342 |
7 | 787968 |
8 | 2489448 |
9 | 7024407 |
10 | 18074875 |
11 | 43072848 |
12 | 96186272 |
13 | 203145852 |
14 | 408774588 |
15 | 788378400 |
16 | 1464523344 |
17 | 2631173181 |
18 | 4587701601 |
19 | 7785938104 |
20 | 12894168000 |
21 | 20882898530 |
22 | 33138238770 |
[1,69,1064,8736,49350,216342,787968,2489448, 7024407,18074875,43072848,96186272,203145852, 408774588,788378400,1464523344,2631173181, 4587701601,7785938104,12894168000,20882898530, 33138238770] |