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 | 131 |
| 2 | 151 |
| 3 | 181 |
| 4 | 191 |
| 5 | 313 |
| 6 | 353 |
| 7 | 373 |
| 8 | 383 |
| 9 | 727 |
| 10 | 757 |
| 11 | 787 |
| 12 | 797 |
| 13 | 919 |
| 14 | 929 |
| 15 | 10301 |
| 16 | 10501 |
| 17 | 10601 |
| 18 | 30103 |
| 19 | 30203 |
| 20 | 30403 |
| 21 | 30703 |
| 22 | 30803 |
| 23 | 70207 |
| 24 | 70507 |
| 25 | 70607 |
| 26 | 90709 |
| 27 | 1003001 |
| 28 | 1008001 |
| 29 | 3001003 |
| 30 | 3002003 |
| 31 | 3007003 |
| 32 | 9002009 |
| 33 | 100030001 |
| 34 | 100050001 |
| 35 | 100060001 |
| 36 | 300020003 |