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 | 7 |
| 1 | 71 |
| 2 | 647 |
| 3 | 5831 |
| 4 | 52487 |
| 5 | 472391 |
| 6 | 4251527 |
| 7 | 38263751 |
| 8 | 344373767 |
| 9 | 3099363911 |
| 10 | 27894275207 |
| 11 | 251048476871 |
| 12 | 2259436291847 |
| 13 | 20334926626631 |
| 14 | 183014339639687 |
| 15 | 1647129056757191 |
| 16 | 14824161510814727 |
| 17 | 133417453597332551 |
| 18 | 1200757082375992967 |