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 | 23 |
| 2 | 505 |
| 3 | 11329 |
| 4 | 254434 |
| 5 | 5714357 |
| 6 | 128339633 |
| 7 | 2882400038 |
| 8 | 64736277049 |
| 9 | 1453922256330 |
| 10 | 32653869265130 |
| 11 | 733378399940297 |
| 12 | 16471061151498381 |
| 13 | 369926160190271627 |
| 14 | 8308229975861003526 |
| 15 | 186595847388277259848 |
| 16 | 4190785566084546949288 |
| 17 | 94121513992523815815370 |