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 | 24 |
| 2 | 196 |
| 3 | 1284 |
| 4 | 9836 |
| 5 | 76524 |
| 6 | 609940 |
| 7 | 4928052 |
| 8 | 40249964 |
| 9 | 331447308 |
| 10 | 2747281456 |
| 11 | 22892351528 |
| 12 | 191590111316 |
| 13 | 1609306726532 |
| 14 | 13559412142738 |
| 15 | 114546085965354 |
| 16 | 969826269069116 |
| 17 | 8227091944066248 |
| 18 | 69907440585587662 |
| 19 | 594878380136137122 |