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 | 10 |
| 1 | 21 |
| 2 | 31 |
| 3 | 300 |
| 4 | 331 |
| 5 | 962 |
| 6 | 19571 |
| 7 | 40104 |
| 8 | 59675 |
| 9 | 577179 |
| 10 | 636854 |
| 11 | 1850887 |
| 12 | 37654594 |
| 13 | 77160075 |
| 14 | 114814669 |
| 15 | 1110492096 |
| 16 | 1225306765 |
| 17 | 3561105626 |
| 18 | 72447419285 |
| 19 | 148455944196 |
| 20 | 220903363481 |
| 21 | 2136586215525 |
| 22 | 2357489579006 |