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 | 16 |
| 2 | 256 |
| 3 | 1723 |
| 4 | 11637 |
| 5 | 65297 |
| 6 | 370045 |
| 7 | 1999150 |
| 8 | 10867960 |
| 9 | 58328512 |
| 10 | 313915268 |
| 11 | 1683430923 |
| 12 | 9037137069 |
| 13 | 48464436537 |
| 14 | 259999868553 |
| 15 | 1394419535984 |
| 16 | 7479394198332 |
| 17 | 40114452013630 |
| 18 | 215155499724100 |
| 19 | 1153964519450151 |