n | a(n) |
---|---|
0 | 1 |
1 | 54 |
2 | 945 |
3 | 9240 |
4 | 62370 |
5 | 324324 |
6 | 1387386 |
7 | 5096520 |
8 | 16563690 |
9 | 48668620 |
10 | 131405274 |
11 | 330142176 |
12 | 779502360 |
13 | 1743502320 |
14 | 3718285560 |
15 | 7601828256 |
16 | 14966099379 |
17 | 28482196050 |
18 | 52568991475 |
19 | 94362067800 |
20 | 165133618650 |
21 | 282337298100 |
22 | 472506635250 |
23 | 775303893000 |
24 | 1249100716500 |
[1,54,945,9240,62370,324324,1387386,5096520, 16563690,48668620,131405274,330142176,779502360, 1743502320,3718285560,7601828256,14966099379, 28482196050,52568991475,94362067800,165133618650, 282337298100,472506635250,775303893000, 1249100716500] |