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| n | a(n) |
|---|---|
| 1 | 153 |
| 2 | 2755 |
| 3 | 49235 |
| 4 | 880781 |
| 5 | 15754461 |
| 6 | 281803871 |
| 7 | 5040682279 |
| 8 | 90163722073 |
| 9 | 1612776998193 |
| 10 | 28848073268443 |
| 11 | 516011408652059 |
| 12 | 9230001997285733 |
| 13 | 165098940527912805 |
| 14 | 2953158641948611223 |
| 15 | 52823754874667184367 |
[153,2755,49235,880781,15754461,281803871, 5040682279,90163722073,1612776998193, 28848073268443,516011408652059,9230001997285733, 165098940527912805,2953158641948611223, 52823754874667184367] |