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 | 7 |
| 2 | 53 |
| 3 | 233 |
| 4 | 767 |
| 5 | 2070 |
| 6 | 4874 |
| 7 | 10283 |
| 8 | 20012 |
| 9 | 36412 |
| 10 | 62780 |
| 11 | 103412 |
| 12 | 164018 |
| 13 | 251615 |
| 14 | 375282 |
| 15 | 545834 |
| 16 | 776713 |
| 17 | 1083692 |
| 18 | 1485962 |
| 19 | 2005409 |
| 20 | 2668396 |
| 21 | 3504549 |
| 22 | 4548781 |
| 23 | 5840076 |
| 24 | 7423854 |
| 25 | 9349952 |
| 26 | 11676207 |
| 27 | 14465536 |
| 28 | 17789881 |
| 29 | 21727318 |
| 30 | 26366500 |