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 | 1 |
| 3 | 4 |
| 4 | 3 |
| 5 | 23 |
| 6 | 11 |
| 7 | 176 |
| 8 | 25 |
| 9 | 563 |
| 10 | 137 |
| 11 | 6508 |
| 12 | 49 |
| 13 | 88069 |
| 14 | 363 |
| 15 | 91072 |
| 16 | 761 |
| 17 | 1593269 |
| 18 | 7129 |
| 19 | 31037876 |
| 20 | 7381 |
| 21 | 31730711 |
| 22 | 83711 |
| 23 | 744355888 |
| 24 | 86021 |
| 25 | 3788707301 |
| 26 | 1145993 |
| 27 | 11552032628 |
| 28 | 1171733 |
| 29 | 340028535787 |
| 30 | 1195757 |