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 | 3 |
| 2 | 23 |
| 3 | 261 |
| 4 | 3947 |
| 5 | 74613 |
| 6 | 1692563 |
| 7 | 44794221 |
| 8 | 1354849547 |
| 9 | 46101247173 |
| 10 | 1742977452803 |
| 11 | 72487571292381 |
| 12 | 3288697207653947 |
| 13 | 161639067567489333 |
| 14 | 8555659001848069043 |
| 15 | 485203383272476257741 |
| 16 | 29350999686572204663147 |
| 17 | 1886474390059466622333093 |