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 | 148 |
| 2 | 4102 |
| 3 | 45988 |
| 4 | 323394 |
| 5 | 1721356 |
| 6 | 7526024 |
| 7 | 28247478 |
| 8 | 93683295 |
| 9 | 280338123 |
| 10 | 769012348 |
| 11 | 1958026231 |
| 12 | 4673735444 |
| 13 | 10543684618 |
| 14 | 22631328296 |
| 15 | 46477583300 |
| 16 | 91756934105 |
| 17 | 174838318505 |
| 18 | 322648096420 |
| 19 | 578369211133 |
| 20 | 1009683032422 |