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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 15 |
| 5 | 142 |
| 6 | 4300 |
| 7 | 384199 |
| 8 | 98654374 |
| 9 | 70130880569 |
| 10 | 136638863494089 |
| 11 | 730439999032117301 |
| 12 | 10764688922047900738650 |
| 13 | 439762062635963206090747374 |
| 14 | 50066701349010686289507943943535 |
| 15 | 15962815411172611585301863116082363362 |
| 16 | 14314975828662356561039590680011420432741442 |
| 17 | 36247244119877673111912410070361564495415461430358 |
[1,3,15,142,4300,384199,98654374,70130880569, 136638863494089,730439999032117301, 10764688922047900738650, 439762062635963206090747374, 50066701349010686289507943943535, 15962815411172611585301863116082363362, 14314975828662356561039590680011420432741442, 36247244119877673111912410070361564495415461430358\ ] |