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 | 5 |
| 2 | 55 |
| 3 | 671 |
| 4 | 8272 |
| 5 | 102091 |
| 6 | 1260143 |
| 7 | 15554592 |
| 8 | 191998646 |
| 9 | 2369942427 |
| 10 | 29253473175 |
| 11 | 361091343583 |
| 12 | 4457144547354 |
| 13 | 55016930950608 |
| 14 | 679103551405906 |
| 15 | 8382540166524150 |
| 16 | 103470199055689961 |
| 17 | 1277188284212361415 |