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 | 1 |
| 2 | 5 |
| 3 | 39 |
| 4 | 369 |
| 5 | 3898 |
| 6 | 44239 |
| 7 | 528083 |
| 8 | 6544745 |
| 9 | 83496720 |
| 10 | 1090091650 |
| 11 | 14501708246 |
| 12 | 195954553755 |
| 13 | 2682953977174 |
| 14 | 37150480629539 |
| 15 | 519455719162283 |
| 16 | 7325383709872345 |
| 17 | 104080732316126716 |
| 18 | 1488685017986884528 |
| 19 | 21420051312840487968 |