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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 38 |
| 3 | 395 |
| 4 | 3848 |
| 5 | 32149 |
| 6 | 261182 |
| 7 | 2095293 |
| 8 | 16774816 |
| 9 | 134213444 |
| 10 | 1073737004 |
| 11 | 8589926161 |
| 12 | 68719468238 |
| 13 | 549755798961 |
| 14 | 4398046497376 |
| 15 | 35184372064343 |
| 16 | 281474976689834 |
| 17 | 2251799813647324 |
| 18 | 18014398509451874 |
| 19 | 144115188075799743 |
[1,38,395,3848,32149,261182,2095293,16774816, 134213444,1073737004,8589926161,68719468238, 549755798961,4398046497376,35184372064343, 281474976689834,2251799813647324, 18014398509451874,144115188075799743] |