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 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 19 |
| 5 | 47 |
| 6 | 73 |
| 7 | 97 |
| 8 | 131 |
| 9 | 223 |
| 10 | 229 |
| 11 | 257 |
| 12 | 263 |
| 13 | 277 |
| 14 | 331 |
| 15 | 367 |
| 16 | 389 |
| 17 | 397 |
| 18 | 487 |
| 19 | 577 |
| 20 | 641 |
| 21 | 643 |
| 22 | 683 |
| 23 | 701 |
| 24 | 739 |
| 25 | 743 |
| 26 | 757 |
| 27 | 797 |
| 28 | 857 |
| 29 | 877 |
| 30 | 1031 |
| 31 | 1291 |
| 32 | 1297 |
| 33 | 1423 |
| 34 | 1451 |
| 35 | 1543 |
| 36 | 1579 |
| 37 | 1637 |
| 38 | 1697 |
| 39 | 1723 |
| 40 | 1823 |
| 41 | 1949 |
| 42 | 2039 |
| 43 | 2081 |
| 44 | 2381 |
| 45 | 2477 |
| 46 | 2539 |
| 47 | 2617 |
| 48 | 2659 |
| 49 | 2689 |
| 50 | 2749 |