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| n | a(n) |
|---|---|
| 1 | 2268 |
| 2 | 12384 |
| 3 | 63838 |
| 4 | 383290 |
| 5 | 2244622 |
| 6 | 14131118 |
| 7 | 88143754 |
| 8 | 572187838 |
| 9 | 3709029086 |
| 10 | 24613160072 |
| 11 | 163670433374 |
| 12 | 1104155427184 |
| 13 | 7473775678826 |
| 14 | 51060113489722 |
| 15 | 350078262846120 |
| 16 | 2415378206667070 |
| 17 | 16720104940755442 |
| 18 | 116264115349570420 |
[2268,12384,63838,383290,2244622,14131118, 88143754,572187838,3709029086,24613160072, 163670433374,1104155427184,7473775678826, 51060113489722,350078262846120,2415378206667070, 16720104940755442,116264115349570420] |