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 | 61 |
| 3 | 109 |
| 4 | 149 |
| 5 | 269 |
| 6 | 389 |
| 7 | 421 |
| 8 | 661 |
| 9 | 701 |
| 10 | 821 |
| 11 | 829 |
| 12 | 1069 |
| 13 | 1181 |
| 14 | 1301 |
| 15 | 1381 |
| 16 | 1429 |
| 17 | 1901 |
| 18 | 1949 |
| 19 | 2141 |
| 20 | 2221 |
| 21 | 2269 |
| 22 | 2309 |
| 23 | 2341 |
| 24 | 2381 |
| 25 | 2549 |
| 26 | 2741 |
| 27 | 2749 |
| 28 | 2789 |
| 29 | 2909 |
| 30 | 3061 |
| 31 | 3109 |
| 32 | 3181 |
| 33 | 3221 |
| 34 | 3229 |
| 35 | 3541 |
| 36 | 3701 |
| 37 | 3709 |
| 38 | 4261 |
| 39 | 4349 |
| 40 | 4421 |
| 41 | 4909 |
| 42 | 5189 |