n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 28 |
4 | 251 |
5 | 2573 |
6 | 28813 |
7 | 343833 |
8 | 4308210 |
9 | 56154805 |
10 | 756731761 |
11 | 10499096630 |
12 | 149551069156 |
13 | 2182935186698 |
14 | 32613646656198 |
15 | 498420592612153 |
16 | 7790219357236805 |
17 | 124545937719356873 |
18 | 2037614647316548891 |
19 | 34134979366157116560 |
[1,1,4,28,251,2573,28813,343833,4308210,56154805, 756731761,10499096630,149551069156,2182935186698, 32613646656198,498420592612153,7790219357236805, 124545937719356873,2037614647316548891, 34134979366157116560] |