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 | 7 |
| 2 | 373 |
| 3 | 30703 |
| 4 | 3007003 |
| 5 | 302070203 |
| 6 | 30207570203 |
| 7 | 3062075702603 |
| 8 | 306020757020603 |
| 9 | 30602075057020603 |
| 10 | 3060320750570230603 |
| 11 | 300603207505702306003 |
| 12 | 30060320275057202306003 |
| 13 | 3006032021750571202306003 |
| 14 | 300603202127505721202306003 |
| 15 | 30046032021275057212023064003 |