The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 78 |
| 3 | 1902 |
| 4 | 76110 |
| 5 | 4553166 |
| 6 | 381523758 |
| 7 | 42700751022 |
| 8 | 6157828055310 |
| 9 | 1112444773251726 |
| 10 | 246141320428525038 |
| 11 | 65480501041227557742 |
| 12 | 20623423521606515356110 |
| 13 | 7590312777562545300695886 |
| 14 | 3228104419544512535098911918 |
| 15 | 1571129867418152272451563414062 |
| 16 | 867697466760475249585357617786510 |
[1,6,78,1902,76110,4553166,381523758,42700751022, 6157828055310,1112444773251726,246141320428525038, 65480501041227557742,20623423521606515356110, 7590312777562545300695886, 3228104419544512535098911918, 1571129867418152272451563414062, 867697466760475249585357617786510] |