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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 34 |
| 3 | 90 |
| 4 | 175 |
| 5 | 800 |
| 6 | 2999 |
| 7 | 3624 |
| 8 | 30624 |
| 9 | 60000 |
| 10 | 390624 |
| 11 | 499999 |
| 12 | 4000000 |
| 13 | 8890624 |
| 14 | 17109375 |
| 15 | 69999999 |
| 16 | 200000000 |
| 17 | 2787109375 |
| 18 | 8999999999 |
| 19 | 81787109375 |
| 20 | 900000000000 |
| 21 | 1918212890624 |
| 22 | 1999999999999 |
| 23 | 70000000000000 |
| 24 | 89918212890624 |
| 25 | 399999999999999 |
| 26 | 659918212890624 |
[4,34,90,175,800,2999,3624,30624,60000,390624, 499999,4000000,8890624,17109375,69999999, 200000000,2787109375,8999999999,81787109375, 900000000000,1918212890624,1999999999999, 70000000000000,89918212890624,399999999999999, 659918212890624] |