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 | 113 |
| 2 | 613 |
| 3 | 24421 |
| 4 | 2042221 |
| 5 | 60731221 |
| 6 | 102975601 |
| 7 | 253102501 |
| 8 | 327449641 |
| 9 | 722798221 |
| 10 | 2284271641 |
| 11 | 46414646521 |
| 12 | 57358506301 |
| 13 | 89249322541 |
| 14 | 129933236221 |
| 15 | 185045469601 |
| 16 | 215232948901 |
| 17 | 323617365541 |
| 18 | 554037063901 |
| 19 | 732039110041 |
| 20 | 2373042229801 |
| 21 | 3076710505441 |
| 22 | 3443735055601 |