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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 8 |
| 6 | 35 |
| 7 | 107 |
| 8 | 247 |
| 9 | 535 |
| 10 | 1223 |
| 11 | 3009 |
| 12 | 8033 |
| 13 | 21789 |
| 14 | 56561 |
| 15 | 141754 |
| 16 | 352916 |
| 17 | 885060 |
| 18 | 2243639 |
| 19 | 5731032 |
| 20 | 14652087 |
| 21 | 37302363 |
| 22 | 94594125 |
| 23 | 239640285 |
| 24 | 607680601 |
| 25 | 1543064845 |
| 26 | 3921438808 |
| 27 | 9965699656 |
| 28 | 25314407628 |
| 29 | 64275368601 |
| 30 | 163181158704 |