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) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 265 |
| 3 | 2780 |
| 4 | 19250 |
| 5 | 91067 |
| 6 | 349122 |
| 7 | 1115334 |
| 8 | 3134307 |
| 9 | 7903501 |
| 10 | 18286018 |
| 11 | 39418159 |
| 12 | 79946582 |
| 13 | 154050794 |
| 14 | 283766861 |
| 15 | 503208408 |
| 16 | 861586362 |
| 17 | 1432132554 |
| 18 | 2314882321 |
| 19 | 3655071196 |
| 20 | 5640732550 |
| 21 | 8538547541 |
| 22 | 12683700617 |
| 23 | 18541085573 |