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 | 99 |
| 2 | 10101 |
| 3 | 1030199 |
| 4 | 105070201 |
| 5 | 10716130299 |
| 6 | 1092940220301 |
| 7 | 111469186340399 |
| 8 | 11368764066500401 |
| 9 | 1159502465596700499 |
| 10 | 118257882726796950501 |
| 11 | 12061144535667692250599 |
| 12 | 1230118484755377812610601 |
| 13 | 125460024300512869194030699 |
| 14 | 12795692360167557279978520701 |
| 15 | 1305035160712790329688615080799 |