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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 122 |
| 3 | 842 |
| 4 | 5517 |
| 5 | 34862 |
| 6 | 210279 |
| 7 | 1198995 |
| 8 | 6435794 |
| 9 | 32506602 |
| 10 | 154792049 |
| 11 | 697073117 |
| 12 | 2979286263 |
| 13 | 12129141182 |
| 14 | 47200560835 |
| 15 | 176145560948 |
| 16 | 632250821238 |
| 17 | 2188584143256 |
| 18 | 7323870287583 |
| 19 | 23744538586763 |
| 20 | 74727529131117 |
[16,122,842,5517,34862,210279,1198995,6435794, 32506602,154792049,697073117,2979286263, 12129141182,47200560835,176145560948,632250821238, 2188584143256,7323870287583,23744538586763, 74727529131117] |