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 | 1 |
| 2 | 86 |
| 3 | 759 |
| 4 | 3100 |
| 5 | 8765 |
| 6 | 19986 |
| 7 | 39571 |
| 8 | 70904 |
| 9 | 117945 |
| 10 | 185230 |
| 11 | 277871 |
| 12 | 401556 |
| 13 | 562549 |
| 14 | 767690 |
| 15 | 1024395 |
| 16 | 1340656 |
| 17 | 1725041 |
| 18 | 2186694 |
| 19 | 2735335 |
| 20 | 3381260 |
| 21 | 4135341 |
| 22 | 5009026 |
| 23 | 6014339 |
| 24 | 7163880 |
| 25 | 8470825 |
| 26 | 9948926 |
| 27 | 11612511 |
| 28 | 13476484 |
| 29 | 15556325 |
| 30 | 17868090 |
| 31 | 20428411 |