The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 273957842462220 |
| 3 | 2460737690938850798370391240644900 |
| 4 | 15195407946323194013765595656097788013666363361791048000 |
| 5 | 13223617955495651593814858107477805060086684838739019514933477474642809905360000 |
[1,273957842462220, 2460737690938850798370391240644900, 15195407946323194013765595656097788013666363361791\ 048000, 13223617955495651593814858107477805060086684838739\ 019514933477474642809905360000] |