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 | 0 |
| 1 | 3 |
| 2 | 69 |
| 3 | 467 |
| 4 | 1858 |
| 5 | 5479 |
| 6 | 13327 |
| 7 | 28343 |
| 8 | 54596 |
| 9 | 97467 |
| 10 | 163833 |
| 11 | 262251 |
| 12 | 403142 |
| 13 | 598975 |
| 14 | 864451 |
| 15 | 1216687 |
| 16 | 1675400 |
| 17 | 2263091 |
| 18 | 3005229 |
| 19 | 3930435 |
| 20 | 5070666 |
| 21 | 6461399 |
| 22 | 8141815 |
| 23 | 10154983 |
| 24 | 12548044 |
| 25 | 15372395 |
| 26 | 18683873 |
| 27 | 22542939 |
| 28 | 27014862 |
| 29 | 32169903 |
| 30 | 38083499 |
| 31 | 44836447 |