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 | 1758 |
| 2 | 5542 |
| 3 | 18018 |
| 4 | 58898 |
| 5 | 191573 |
| 6 | 615561 |
| 7 | 1940673 |
| 8 | 6155514 |
| 9 | 19647614 |
| 10 | 62899953 |
| 11 | 201473363 |
| 12 | 644672930 |
| 13 | 2059300887 |
| 14 | 6574540879 |
| 15 | 20997506212 |
| 16 | 67093545303 |
| 17 | 214438467736 |
| 18 | 685364105241 |
| 19 | 2190180322534 |
| 20 | 6998231709363 |
| 21 | 22360737339084 |