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 | 10 |
| 3 | 105 |
| 4 | 2211 |
| 5 | 16836 |
| 6 | 105111 |
| 7 | 2220778 |
| 8 | 14319276 |
| 9 | 221098906 |
| 10 | 1087061878 |
| 11 | 11402689605 |
| 12 | 223577504556 |
| 13 | 1264725045100 |
| 14 | 50869724563503 |
| 15 | 111335989114503 |
| 16 | 2399795843858155 |
| 17 | 11141229266441550 |
| 18 | 127955437456464996 |
| 19 | 1070124037258522456 |