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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 14 |
| 4 | 44 |
| 5 | 141 |
| 6 | 447 |
| 7 | 1414 |
| 8 | 4472 |
| 9 | 14142 |
| 10 | 44721 |
| 11 | 141421 |
| 12 | 447213 |
| 13 | 1414213 |
| 14 | 4472135 |
| 15 | 14142135 |
| 16 | 44721359 |
| 17 | 141421356 |
| 18 | 447213595 |
| 19 | 1414213562 |
| 20 | 4472135954 |
| 21 | 14142135623 |
| 22 | 44721359549 |
| 23 | 141421356237 |
| 24 | 447213595499 |
| 25 | 1414213562373 |
| 26 | 4472135954999 |
[1,4,14,44,141,447,1414,4472,14142,44721,141421, 447213,1414213,4472135,14142135,44721359, 141421356,447213595,1414213562,4472135954, 14142135623,44721359549,141421356237,447213595499, 1414213562373,4472135954999] |