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 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 47 |
| 6 | 37 |
| 7 | 319 |
| 8 | 533 |
| 9 | 1879 |
| 10 | 1627 |
| 11 | 20417 |
| 12 | 18107 |
| 13 | 263111 |
| 14 | 237371 |
| 15 | 261395 |
| 16 | 477745 |
| 17 | 8842385 |
| 18 | 8161705 |
| 19 | 167324635 |
| 20 | 155685007 |
| 21 | 166770367 |
| 22 | 156188887 |
| 23 | 3825136961 |
| 24 | 3602044091 |
| 25 | 19081066231 |
| 26 | 18051406831 |
| 27 | 57128792093 |
| 28 | 54260455193 |
| 29 | 1653866633797 |