| n | a(n) |
|---|---|
| 1 | 37 |
| 2 | 5387 |
| 3 | 537037 |
| 4 | 37220537 |
| 5 | 38870537 |
| 6 | 3703870537 |
| 7 | 5555555387 |
| 8 | 55538720387 |
| 9 | 370553872037 |
| 10 | 370555370387 |
| 11 | 372203887037 |
| 12 | 387037038887 |
| 13 | 387203705387 |
| 14 | 388887053887 |
| 15 | 537203703887 |
| 16 | 538705553887 |
| 17 | 538722205537 |
| 18 | 538870538887 |
| 19 | 553703722037 |
| 20 | 553720538887 |
[37,5387,537037,37220537,38870537,3703870537, 5555555387,55538720387,370553872037,370555370387, 372203887037,387037038887,387203705387, 388887053887,537203703887,538705553887, 538722205537,538870538887,553703722037, 553720538887] |