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) |
|---|---|
| 0 | 1 |
| 1 | 31 |
| 2 | 211 |
| 3 | 781 |
| 4 | 2101 |
| 5 | 4651 |
| 6 | 9031 |
| 7 | 15961 |
| 8 | 26281 |
| 9 | 40951 |
| 10 | 61051 |
| 11 | 87781 |
| 12 | 122461 |
| 13 | 166531 |
| 14 | 221551 |
| 15 | 289201 |
| 16 | 371281 |
| 17 | 469711 |
| 18 | 586531 |
| 19 | 723901 |
| 20 | 884101 |
| 21 | 1069531 |
| 22 | 1282711 |
| 23 | 1526281 |
| 24 | 1803001 |
| 25 | 2115751 |
| 26 | 2467531 |