n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 54 |
4 | 1280 |
5 | 44500 |
6 | 2095632 |
7 | 127881376 |
8 | 9819500544 |
9 | 928097190000 |
10 | 106056995000000 |
11 | 14432021983025504 |
12 | 2308065337772034048 |
13 | 428863163196474895616 |
14 | 91656939861553564825600 |
15 | 22332165732277725605760000 |
16 | 6154560612828089005182025728 |
17 | 1905106896258617768240402396928 |
18 | 658221263587332244069472967367680 |
19 | 252407458471654722567803941053452800 |
[1,4,54,1280,44500,2095632,127881376,9819500544, 928097190000,106056995000000,14432021983025504, 2308065337772034048,428863163196474895616, 91656939861553564825600, 22332165732277725605760000, 6154560612828089005182025728, 1905106896258617768240402396928, 658221263587332244069472967367680, 252407458471654722567803941053452800] |