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 | 7 |
| 1 | 50 |
| 2 | 707 |
| 3 | 4999 |
| 4 | 70693 |
| 5 | 499850 |
| 6 | 7068593 |
| 7 | 49980001 |
| 8 | 706788607 |
| 9 | 4997500250 |
| 10 | 70671792107 |
| 11 | 499700044999 |
| 12 | 7066472422093 |
| 13 | 49965006999650 |
| 14 | 706576570417193 |
| 15 | 4996000999920001 |
| 16 | 70650590569297207 |
| 17 | 499550134985000450 |
| 18 | 7064352480359303507 |
| 19 | 49950017497500124999 |