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 | 1 |
| 4 | 12 |
| 5 | 72 |
| 6 | 467 |
| 7 | 2900 |
| 8 | 18426 |
| 9 | 117323 |
| 10 | 756237 |
| 11 | 4910525 |
| 12 | 32135651 |
| 13 | 211604221 |
| 14 | 1401106330 |
| 15 | 9321239836 |
| 16 | 62271754986 |
| 17 | 417545272654 |