| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 27 |
| 4 | 350 |
| 5 | 2915 |
| 6 | 58156 |
| 7 | 714483 |
| 8 | 19279494 |
| 9 | 314352219 |
| 10 | 10702577028 |
| 11 | 217898279709 |
| 12 | 8961716977044 |
| 13 | 218984398436089 |
| 14 | 10559918611732824 |
| 15 | 301232711294645459 |
| 16 | 16665825788607694854 |
| 17 | 543748938748390962083 |
| 18 | 33949005044435560537540 |
| 19 | 1247096314671704716427281 |
| 20 | 86735021741507120417172516 |
| 21 | 3542923311990891744041871249 |
| 22 | 271628142382739329884065326824 |
| 23 | 12213792889354508458626454059325 |
| 24 | 1023380788552996903255162728503100 |
[1,1,6,27,350,2915,58156,714483,19279494, 314352219,10702577028,217898279709,8961716977044, 218984398436089,10559918611732824, 301232711294645459,16665825788607694854, 543748938748390962083,33949005044435560537540, 1247096314671704716427281, 86735021741507120417172516, 3542923311990891744041871249, 271628142382739329884065326824, 12213792889354508458626454059325, 1023380788552996903255162728503100] |