n | a(n) |
---|---|
1 | 4 |
2 | 79 |
3 | 900 |
4 | 7885 |
5 | 59080 |
6 | 398846 |
7 | 2499096 |
8 | 14805705 |
9 | 83969600 |
10 | 459868530 |
11 | 2447439384 |
12 | 12718070274 |
13 | 64766697520 |
14 | 324156347260 |
15 | 1598200903280 |
16 | 7776728909121 |
17 | 37404399901296 |
18 | 178060831286890 |
19 | 839857764202520 |
20 | 3928581810398630 |
21 | 18239060530882224 |
22 | 84101317494787684 |
[4,79,900,7885,59080,398846,2499096,14805705, 83969600,459868530,2447439384,12718070274, 64766697520,324156347260,1598200903280, 7776728909121,37404399901296,178060831286890, 839857764202520,3928581810398630, 18239060530882224,84101317494787684] |