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 | 2 |
| 4 | 5 |
| 5 | 6 |
| 6 | 29 |
| 7 | 28 |
| 8 | 142 |
| 9 | 242 |
| 10 | 1222 |
| 11 | 1664 |
| 12 | 15935 |
| 13 | 18198 |
| 14 | 134452 |
| 15 | 376424 |
| 16 | 1415060 |
| 17 | 2634596 |
| 18 | 26534337 |
| 19 | 33499358 |
| 20 | 287001476 |
| 21 | 727425470 |
| 22 | 3332039278 |
| 23 | 5794658930 |
| 24 | 61120838930 |
| 25 | 93825569002 |
| 26 | 601444720052 |