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 | 186621 |
| 2 | 532900 |
| 3 | 1857351 |
| 4 | 9046409 |
| 5 | 17439233 |
| 6 | 69012421 |
| 7 | 146766357 |
| 8 | 289744476 |
| 9 | 347411351 |
| 10 | 390219121 |
| 11 | 1200809057 |
| 12 | 1393838392 |
| 13 | 3088676989 |
| 14 | 2383346701 |
| 15 | 3333147809 |
| 16 | 6041072349 |
| 17 | 6819663132 |
| 18 | 7822398453 |
| 19 | 9534770061 |
| 20 | 12359264257 |
| 21 | 18701296795 |
| 22 | 20196246357 |
| 23 | 25763014657 |