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 | 102 |
| 4 | 1252 |
| 5 | 18555 |
| 6 | 324726 |
| 7 | 6565468 |
| 8 | 150652552 |
| 9 | 3868151445 |
| 10 | 109876543210 |
| 11 | 3420886930626 |
| 12 | 115835619046764 |
| 13 | 4238148192940207 |
| 14 | 166614350863692382 |
| 15 | 7004068093591806840 |
| 16 | 313512663723845890576 |
| 17 | 14887093306681068252201 |
| 18 | 747445606689889243214802 |