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 | 0 |
| 2 | 0 |
| 3 | 65 |
| 4 | 730 |
| 5 | 4890 |
| 6 | 19786 |
| 7 | 67171 |
| 8 | 180724 |
| 9 | 446964 |
| 10 | 962780 |
| 11 | 1978405 |
| 12 | 3703310 |
| 13 | 6735950 |
| 14 | 11445110 |
| 15 | 19092295 |
| 16 | 30220776 |
| 17 | 47260136 |
| 18 | 70866264 |
| 19 | 105409929 |
| 20 | 151455810 |
| 21 | 216455810 |
| 22 | 300450370 |
| 23 | 415601835 |
| 24 | 560651740 |
| 25 | 754740700 |
| 26 | 994054516 |
| 27 | 1307797101 |
| 28 | 1687688054 |
| 29 | 2177107894 |