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| n | a(n) |
|---|---|
| 1 | 1240455298 |
| 2 | 1982068849 |
| 3 | 2572437376 |
| 4 | 4518555426 |
| 5 | 6656676736 |
| 6 | 9620299328 |
| 7 | 20253298532 |
| 8 | 128896188864 |
| 9 | 1430854315232 |
| 10 | 8336227917170 |
| 11 | 59924952387184 |
| 12 | 645348966859136 |
| 13 | 3709285229683898 |
| 14 | 26509588554453184 |
| 15 | 285311677590771520 |
[1240455298,1982068849,2572437376,4518555426, 6656676736,9620299328,20253298532,128896188864, 1430854315232,8336227917170,59924952387184, 645348966859136,3709285229683898, 26509588554453184,285311677590771520] |