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 | 9 |
| 2 | 15 |
| 3 | 87 |
| 4 | 49 |
| 5 | 235 |
| 6 | 403 |
| 7 | 1241 |
| 8 | 1383 |
| 9 | 1047 |
| 10 | 3341 |
| 11 | 4359 |
| 12 | 9663 |
| 13 | 11499 |
| 14 | 14163 |
| 15 | 5947 |
| 16 | 11183 |
| 17 | 19103 |
| 18 | 45151 |
| 19 | 50943 |
| 20 | 31367 |
| 21 | 173747 |
| 22 | 306003 |
| 23 | 215021 |
| 24 | 191303 |
| 25 | 86663 |
| 26 | 62797 |
| 27 | 362609 |
| 28 | 425405 |
| 29 | 346727 |
| 30 | 531247 |
| 31 | 676067 |
| 32 | 721311 |
| 33 | 793469 |
| 34 | 741899 |
| 35 | 1637447 |
| 36 | 2896177 |
| 37 | 311843 |
| 38 | 4477649 |
| 39 | 7702927 |
| 40 | 1208153 |