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 | 18 |
| 3 | 116 |
| 4 | 470 |
| 5 | 1449 |
| 6 | 3724 |
| 7 | 8400 |
| 8 | 17172 |
| 9 | 32505 |
| 10 | 57838 |
| 11 | 97812 |
| 12 | 158522 |
| 13 | 247793 |
| 14 | 375480 |
| 15 | 553792 |
| 16 | 797640 |
| 17 | 1125009 |
| 18 | 1557354 |
| 19 | 2120020 |
| 20 | 2842686 |
| 21 | 3759833 |
| 22 | 4911236 |
| 23 | 6342480 |
| 24 | 8105500 |
| 25 | 10259145 |
| 26 | 12869766 |
| 27 | 16011828 |
| 28 | 19768546 |
| 29 | 24232545 |
| 30 | 29506544 |