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 | 3 |
| 2 | 11 |
| 3 | 223 |
| 4 | 1741 |
| 5 | 5851 |
| 6 | 27031 |
| 7 | 74131 |
| 8 | 216061 |
| 9 | 1061311 |
| 10 | 1259821 |
| 11 | 2000503 |
| 12 | 4251691 |
| 13 | 5832181 |
| 14 | 13824241 |
| 15 | 21024853 |
| 16 | 30371641 |
| 17 | 37933393 |
| 18 | 49028263 |
| 19 | 54010531 |
| 20 | 67917721 |
| 21 | 84028111 |
| 22 | 123506491 |
| 23 | 162771883 |
| 24 | 185193571 |
| 25 | 191103553 |
| 26 | 216000601 |
| 27 | 229221541 |
| 28 | 250047631 |
| 29 | 264609931 |