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 | 26 |
| 2 | 676 |
| 3 | 2812 |
| 4 | 12040 |
| 5 | 49442 |
| 6 | 205258 |
| 7 | 856480 |
| 8 | 3559040 |
| 9 | 14795830 |
| 10 | 61589756 |
| 11 | 256239484 |
| 12 | 1065818440 |
| 13 | 4434375632 |
| 14 | 18449465050 |
| 15 | 76753459760 |
| 16 | 319315656274 |
| 17 | 1328477921238 |
| 18 | 5526925286486 |
| 19 | 22993687059966 |
| 20 | 95661297604612 |