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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 73 |
| 3 | 89 |
| 4 | 503 |
| 5 | 2066 |
| 6 | 6598 |
| 7 | 30780 |
| 8 | 125759 |
| 9 | 498466 |
| 10 | 2153157 |
| 11 | 8854291 |
| 12 | 36716124 |
| 13 | 154630611 |
| 14 | 641522869 |
| 15 | 2677738287 |
| 16 | 11204356400 |
| 17 | 46682896140 |
| 18 | 194912316404 |
| 19 | 814236444189 |
| 20 | 3397596012378 |
| 21 | 14184233511277 |
| 22 | 59227911018086 |
[16,73,89,503,2066,6598,30780,125759,498466, 2153157,8854291,36716124,154630611,641522869, 2677738287,11204356400,46682896140,194912316404, 814236444189,3397596012378,14184233511277, 59227911018086] |