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 | 9 |
| 3 | 109 |
| 4 | 2057 |
| 5 | 50001 |
| 6 | 1493109 |
| 7 | 52706753 |
| 8 | 2147485705 |
| 9 | 99179645293 |
| 10 | 5120000050009 |
| 11 | 292159150705665 |
| 12 | 18260173719523445 |
| 13 | 1240576436601868289 |
| 14 | 91029559915023973833 |
| 15 | 7174453500000000050109 |
| 16 | 604462909807316734838793 |
| 17 | 54214017802982966177103873 |