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 | 5 |
| 2 | 53 |
| 3 | 151 |
| 4 | 251 |
| 5 | 353 |
| 6 | 503 |
| 7 | 521 |
| 8 | 523 |
| 9 | 541 |
| 10 | 1051 |
| 11 | 1151 |
| 12 | 1153 |
| 13 | 1451 |
| 14 | 1453 |
| 15 | 1511 |
| 16 | 1523 |
| 17 | 1531 |
| 18 | 1543 |
| 19 | 1553 |
| 20 | 2053 |
| 21 | 2153 |
| 22 | 2251 |
| 23 | 2351 |
| 24 | 2503 |
| 25 | 2521 |
| 26 | 2531 |
| 27 | 2543 |
| 28 | 2551 |
| 29 | 3251 |
| 30 | 3253 |
| 31 | 3511 |
| 32 | 3533 |
| 33 | 3541 |