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 | 399996663 |
| 2 | 666609999 |
| 3 | 669969663 |
| 4 | 690696969 |
| 5 | 699966663 |
| 6 | 2789929969 |
| 7 | 3066999963 |
| 8 | 3366339999 |
| 9 | 3366999933 |
| 10 | 3399696663 |
| 11 | 3399996633 |
| 12 | 3666699663 |
| 13 | 3669933993 |
| 14 | 3933969693 |
| 15 | 6066690999 |
| 16 | 6069996663 |
| 17 | 6099996633 |
| 18 | 6393996933 |
| 19 | 6399636963 |
| 20 | 6666009999 |
| 21 | 6669669633 |
| 22 | 6966939633 |