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 | 1 |
| 2 | 10 |
| 3 | 105 |
| 4 | 1035 |
| 5 | 10011 |
| 6 | 100128 |
| 7 | 1000405 |
| 8 | 10001628 |
| 9 | 100005153 |
| 10 | 1000006281 |
| 11 | 10000020331 |
| 12 | 100000404505 |
| 13 | 1000001326005 |
| 14 | 10000002437316 |
| 15 | 100000012392316 |
| 16 | 1000000042485480 |
| 17 | 10000000037150046 |
| 18 | 100000000000018810 |
| 19 | 1000000000179470703 |
| 20 | 10000000002237948990 |