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 | 46441 |
| 2 | 117307 |
| 3 | 530713 |
| 4 | 5488957657 |
| 5 | 13841169553 |
| 6 | 24794753833 |
| 7 | 82653662521 |
| 8 | 151333837273 |
| 9 | 282429005041 |
| 10 | 464403405313 |
| 11 | 782756904961 |
| 12 | 999999000001 |
| 13 | 1418517921241 |
| 14 | 2699552509993 |
| 15 | 2985982272001 |
| 16 | 3138426605161 |
| 17 | 4001502141001 |
| 18 | 28722895031251 |
| 19 | 47045874141001 |
| 20 | 56693904845761 |
| 21 | 78672332016307 |