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 | 3 |
| 2 | 44 |
| 3 | 355 |
| 4 | 3195 |
| 5 | 99733 |
| 6 | 833719 |
| 7 | 5419351 |
| 8 | 80143857 |
| 9 | 657408909 |
| 10 | 6167950454 |
| 11 | 42106686282 |
| 12 | 983339177173 |
| 13 | 8958937768937 |
| 14 | 94960529682104 |
| 15 | 428224593349304 |
| 16 | 6134899525417045 |
| 17 | 66627445592888887 |
| 18 | 430010946591069243 |
| 19 | 5293386250278608690 |
| 20 | 31760317501671652140 |