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 | 1 |
| 1 | 179 |
| 2 | 5280 |
| 3 | 82610 |
| 4 | 919615 |
| 5 | 8284857 |
| 6 | 64730022 |
| 7 | 457217400 |
| 8 | 2999230965 |
| 9 | 18608607535 |
| 10 | 110625457964 |
| 11 | 636103699038 |
| 12 | 3562753619915 |
| 13 | 19541111960965 |
| 14 | 105392471360850 |
| 15 | 560747327119908 |
| 16 | 2950726075955265 |
| 17 | 15387821226034875 |
| 18 | 79656442803398680 |
| 19 | 409857988825489610 |