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 | 3 |
| 3 | 4 |
| 4 | 13 |
| 5 | 6 |
| 6 | 109 |
| 7 | 8 |
| 8 | 777 |
| 9 | 2197 |
| 10 | 7541 |
| 11 | 12 |
| 12 | 374809 |
| 13 | 14 |
| 14 | 1675773 |
| 15 | 31954096 |
| 16 | 100794385 |
| 17 | 18 |
| 18 | 7391871271 |
| 19 | 20 |
| 20 | 163547770441 |
| 21 | 2037381161992 |
| 22 | 570634875581 |
| 23 | 24 |
| 24 | 1275177760626097 |
| 25 | 476837158203151 |
| 26 | 605750431288341 |
| 27 | 450286447756825720 |
| 28 | 2258377795760750777 |
| 29 | 30 |