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 | 2450 |
| 2 | 2827442 |
| 3 | 3420650 |
| 4 | 131091050 |
| 5 | 607597850 |
| 6 | 1387525250 |
| 7 | 3262865762 |
| 8 | 3969189002 |
| 9 | 4362536450 |
| 10 | 7370136650 |
| 11 | 8882968250 |
| 12 | 38513866250 |
| 13 | 43618113650 |
| 14 | 96254752250 |
| 15 | 110842051970 |
| 16 | 123657370850 |
| 17 | 135755034050 |
| 18 | 170940489050 |
| 19 | 304758650450 |
| 20 | 328385729450 |
| 21 | 472300879322 |