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 | 1 |
| 2 | 7 |
| 3 | 34 |
| 4 | 227 |
| 5 | 1296 |
| 6 | 10576 |
| 7 | 77554 |
| 8 | 729379 |
| 9 | 7013419 |
| 10 | 77371042 |
| 11 | 910455096 |
| 12 | 11877617828 |
| 13 | 165087132666 |
| 14 | 2480783846184 |
| 15 | 39677415301224 |
| 16 | 675818886754115 |
| 17 | 12180498014887816 |
| 18 | 231893906693650507 |
| 19 | 4645789707491981892 |
| 20 | 97740610362119850762 |
| 21 | 2153888078209948673032 |