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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 49 |
| 3 | 374 |
| 4 | 2499 |
| 5 | 15624 |
| 6 | 93749 |
| 7 | 546874 |
| 8 | 3124999 |
| 9 | 17578124 |
| 10 | 97656249 |
| 11 | 537109374 |
| 12 | 2929687499 |
| 13 | 15869140624 |
| 14 | 85449218749 |
| 15 | 457763671874 |
| 16 | 2441406249999 |
| 17 | 12969970703124 |
| 18 | 68664550781249 |
| 19 | 362396240234374 |
| 20 | 1907348632812499 |
| 21 | 10013580322265624 |
| 22 | 52452087402343749 |
[4,49,374,2499,15624,93749,546874,3124999, 17578124,97656249,537109374,2929687499, 15869140624,85449218749,457763671874, 2441406249999,12969970703124,68664550781249, 362396240234374,1907348632812499, 10013580322265624,52452087402343749] |