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 | 7 |
| 2 | 97 |
| 3 | 525 |
| 4 | 1845 |
| 5 | 5032 |
| 6 | 11602 |
| 7 | 23730 |
| 8 | 44370 |
| 9 | 77378 |
| 10 | 127628 |
| 11 | 201135 |
| 12 | 305175 |
| 13 | 448403 |
| 14 | 640973 |
| 15 | 894660 |
| 16 | 1222981 |
| 17 | 1641308 |
| 18 | 2166998 |
| 19 | 2819506 |
| 20 | 3620506 |
| 21 | 4594013 |
| 22 | 5766503 |
| 23 | 7167031 |
| 24 | 8827351 |
| 25 | 10782039 |
| 26 | 13068609 |
| 27 | 15727636 |
| 28 | 18802876 |