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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 11 |
| 5 | 196 |
| 6 | 1195 |
| 7 | 4544 |
| 8 | 13215 |
| 9 | 32276 |
| 10 | 69671 |
| 11 | 137120 |
| 12 | 251139 |
| 13 | 434180 |
| 14 | 715891 |
| 15 | 1134496 |
| 16 | 1738295 |
| 17 | 2587284 |
| 18 | 3754895 |
| 19 | 5329856 |
| 20 | 7418171 |
| 21 | 10145220 |
| 22 | 13657979 |
| 23 | 18127360 |
| 24 | 23750671 |
| 25 | 30754196 |
| 26 | 39395895 |
| 27 | 49968224 |
| 28 | 62801075 |
| 29 | 78264836 |
| 30 | 96773571 |
| 31 | 118788320 |
| 32 | 144820519 |