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 | 22 |
| 3 | 99 |
| 4 | 853 |
| 5 | 18190 |
| 6 | 152587 |
| 7 | 2045269 |
| 8 | 42299374 |
| 9 | 727767387 |
| 10 | 13958567845 |
| 11 | 286835405806 |
| 12 | 5764350599731 |
| 13 | 117817168320181 |
| 14 | 2437382604831502 |
| 15 | 50489841095677539 |
| 16 | 1050381458044863253 |
| 17 | 21936143744564786830 |