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| n | a(n) |
|---|---|
| 1 | 30 |
| 2 | 282 |
| 3 | 2187 |
| 4 | 13345 |
| 5 | 66503 |
| 6 | 281016 |
| 7 | 1037193 |
| 8 | 3420692 |
| 9 | 10260128 |
| 10 | 28379127 |
| 11 | 73192023 |
| 12 | 177601008 |
| 13 | 408454945 |
| 14 | 895812869 |
| 15 | 1883191437 |
| 16 | 3811219431 |
| 17 | 7453126082 |
| 18 | 14128822736 |
| 19 | 26035706883 |
| 20 | 46749593643 |
| 21 | 81969420795 |
| 22 | 140605855270 |
[30,282,2187,13345,66503,281016,1037193,3420692, 10260128,28379127,73192023,177601008,408454945, 895812869,1883191437,3811219431,7453126082, 14128822736,26035706883,46749593643,81969420795, 140605855270] |