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 | 19 |
| 2 | 311 |
| 3 | 1321 |
| 4 | 1523 |
| 5 | 2129 |
| 6 | 3947 |
| 7 | 4957 |
| 8 | 5563 |
| 9 | 6977 |
| 10 | 7583 |
| 11 | 9199 |
| 12 | 111119 |
| 13 | 115123 |
| 14 | 159167 |
| 15 | 163171 |
| 16 | 165173 |
| 17 | 169177 |
| 18 | 171179 |
| 19 | 183191 |
| 20 | 193201 |
| 21 | 195203 |
| 22 | 199207 |
| 23 | 201209 |
| 24 | 205213 |
| 25 | 211219 |
| 26 | 229237 |
| 27 | 235243 |
| 28 | 241249 |
| 29 | 249257 |
| 30 | 265273 |