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 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 47 |
| 7 | 191 |
| 8 | 383 |
| 9 | 3067 |
| 10 | 12269 |
| 11 | 196307 |
| 12 | 6281839 |
| 13 | 50254717 |
| 14 | 201018869 |
| 15 | 804075479 |
| 16 | 1608150959 |
| 17 | 102921661397 |
| 18 | 1646746582367 |
| 19 | 13173972658937 |
| 20 | 105391781271503 |
| 21 | 210783562543007 |
| 22 | 3372537000688127 |
| 23 | 26980296005505019 |
| 24 | 863369472176160611 |