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 | 1231 |
| 6 | 1291 |
| 7 | 1321 |
| 8 | 1361 |
| 9 | 1381 |
| 10 | 1451 |
| 11 | 1471 |
| 12 | 1481 |
| 13 | 1531 |
| 14 | 1571 |
| 15 | 1621 |
| 16 | 1721 |
| 17 | 1741 |
| 18 | 1831 |
| 19 | 1861 |
| 20 | 1871 |
| 21 | 1931 |
| 22 | 1951 |
| 23 | 12391 |
| 24 | 12421 |
| 25 | 12451 |
| 26 | 12491 |
| 27 | 12541 |
| 28 | 12641 |
| 29 | 12671 |
| 30 | 12721 |
| 31 | 12781 |
| 32 | 12791 |
| 33 | 12821 |
| 34 | 12841 |
| 35 | 12941 |
| 36 | 13421 |
| 37 | 13451 |
| 38 | 13591 |
| 39 | 13681 |