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) |
|---|---|
| 9 | 1 |
| 10 | 2 |
| 11 | 6 |
| 12 | 17 |
| 13 | 50 |
| 14 | 143 |
| 15 | 416 |
| 16 | 1199 |
| 17 | 3473 |
| 18 | 10042 |
| 19 | 29089 |
| 20 | 84259 |
| 21 | 244316 |
| 22 | 708679 |
| 23 | 2057087 |
| 24 | 5974077 |
| 25 | 17359390 |
| 26 | 50467157 |
| 27 | 146789962 |
| 28 | 427148444 |
| 29 | 1243513350 |
| 30 | 3621591235 |
| 31 | 10551595959 |
| 32 | 30753712080 |
| 33 | 89666493709 |
| 34 | 261522175986 |
| 35 | 763002239120 |
| 36 | 2226771020793 |
| 37 | 6500575182332 |