This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 19 |
| 6 | 29 |
| 7 | 37 |
| 8 | 47 |
| 9 | 59 |
| 10 | 79 |
| 11 | 97 |
| 12 | 397 |
| 13 | 499 |
| 14 | 599 |
| 15 | 1999 |
| 16 | 2999 |
| 17 | 3989 |
| 18 | 4999 |
| 19 | 29989 |
| 20 | 49999 |
| 21 | 59999 |
| 22 | 79999 |
| 23 | 199999 |
| 24 | 599999 |
| 25 | 799999 |
| 26 | 2999999 |
| 27 | 4999999 |
| 28 | 5999993 |
| 29 | 19999999 |
| 30 | 29999999 |
| 31 | 59999999 |
| 32 | 69999989 |
| 33 | 99999989 |
| 34 | 199999991 |
| 35 | 699999953 |
| 36 | 799999999 |
| 37 | 5999999989 |
| 38 | 6999999989 |