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 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 13 |
| 8 | 91 |
| 9 | 456 |
| 10 | 1834 |
| 11 | 6293 |
| 12 | 19125 |
| 13 | 52781 |
| 14 | 134643 |
| 15 | 321622 |
| 16 | 726650 |
| 17 | 1564696 |
| 18 | 3231635 |
| 19 | 6432859 |
| 20 | 12395504 |
| 21 | 23195905 |
| 22 | 42287433 |
| 23 | 75274166 |
| 24 | 131143033 |
| 25 | 223982780 |
| 26 | 375713010 |
| 27 | 619712403 |
| 28 | 1006599177 |
| 29 | 1611563058 |
| 30 | 2546148075 |
| 31 | 3972522337 |
| 32 | 6126699846 |
| 33 | 9345436668 |