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) |
|---|---|
| 0 | 33647 |
| 1 | 100943 |
| 2 | 302831 |
| 3 | 908495 |
| 4 | 2725487 |
| 5 | 8176463 |
| 6 | 24529391 |
| 7 | 73588175 |
| 8 | 220764527 |
| 9 | 662293583 |
| 10 | 1986880751 |
| 11 | 5960642255 |
| 12 | 17881926767 |
| 13 | 53645780303 |
| 14 | 160937340911 |
| 15 | 482812022735 |
| 16 | 1448436068207 |
| 17 | 4345308204623 |
| 18 | 13035924613871 |
| 19 | 39107773841615 |
| 20 | 117323321524847 |
| 21 | 351969964574543 |