n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 208 |
5 | 2146 |
6 | 26368 |
7 | 375733 |
8 | 6092032 |
9 | 110769550 |
10 | 2232792064 |
11 | 49426061818 |
12 | 1192151302144 |
13 | 31123028996164 |
14 | 874428204384256 |
15 | 26308967412122125 |
16 | 843984969276915712 |
17 | 28757604639850111894 |
18 | 1037239628039528906752 |
19 | 39481325230750749160462 |
[1,1,4,25,208,2146,26368,375733,6092032,110769550, 2232792064,49426061818,1192151302144, 31123028996164,874428204384256,26308967412122125, 843984969276915712,28757604639850111894, 1037239628039528906752,39481325230750749160462] |