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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 16 |
| 6 | 27 |
| 7 | 65 |
| 8 | 108 |
| 9 | 267 |
| 10 | 440 |
| 11 | 1105 |
| 12 | 1812 |
| 13 | 4597 |
| 14 | 7514 |
| 15 | 19196 |
| 16 | 31307 |
| 17 | 80380 |
| 18 | 130883 |
| 19 | 337284 |
| 20 | 548547 |
| 21 | 1417582 |
| 22 | 2303413 |
| 23 | 5965622 |
| 24 | 9686617 |
| 25 | 25130844 |
| 26 | 40783083 |
| 27 | 105954110 |
| 28 | 171868037 |
| 29 | 447015744 |
| 30 | 724837891 |
| 31 | 1886996681 |