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 | 42 |
| 3 | 345 |
| 4 | 1597 |
| 5 | 5436 |
| 6 | 15217 |
| 7 | 37148 |
| 8 | 81901 |
| 9 | 166819 |
| 10 | 318857 |
| 11 | 578413 |
| 12 | 1004224 |
| 13 | 1679522 |
| 14 | 2719666 |
| 15 | 4281488 |
| 16 | 6574614 |
| 17 | 9875045 |
| 18 | 14541308 |
| 19 | 21033513 |
| 20 | 29935679 |
| 21 | 41981720 |
| 22 | 58085511 |
| 23 | 79375484 |
| 24 | 107234235 |
| 25 | 143343655 |
| 26 | 189736131 |
| 27 | 248852397 |
| 28 | 323606650 |
| 29 | 417459582 |
| 30 | 534500016 |