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 | 1 |
| 2 | 12 |
| 3 | 143 |
| 4 | 770 |
| 5 | 3368 |
| 6 | 12632 |
| 7 | 38566 |
| 8 | 98968 |
| 9 | 222351 |
| 10 | 450682 |
| 11 | 843169 |
| 12 | 1479116 |
| 13 | 2460912 |
| 14 | 3917228 |
| 15 | 6006056 |
| 16 | 8917888 |
| 17 | 12878847 |
| 18 | 18153806 |
| 19 | 25049515 |
| 20 | 33917724 |
| 21 | 45158308 |
| 22 | 59222392 |
| 23 | 76615476 |
| 24 | 97900560 |
| 25 | 123701269 |
| 26 | 154704978 |
| 27 | 191665937 |
| 28 | 235408396 |
| 29 | 286829730 |
| 30 | 346903564 |