n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 12 |
5 | 138 |
6 | 2370 |
7 | 54190 |
8 | 1553258 |
9 | 53883088 |
10 | 2211883428 |
11 | 105760271082 |
12 | 5819880201432 |
13 | 364979361177134 |
14 | 25865387272507770 |
15 | 2056021496464455000 |
16 | 182094050389241652004 |
17 | 17861355920109599058260 |
18 | 1929874166854161381238676 |
19 | 228564755268775651632722308 |
20 | 29540844190975459101114949972 |
[1,1,2,12,138,2370,54190,1553258,53883088, 2211883428,105760271082,5819880201432, 364979361177134,25865387272507770, 2056021496464455000,182094050389241652004, 17861355920109599058260,1929874166854161381238676, 228564755268775651632722308, 29540844190975459101114949972] |