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 | 41 |
| 3 | 370 |
| 4 | 1104 |
| 5 | 5800 |
| 6 | 47968 |
| 7 | 284289 |
| 8 | 1400065 |
| 9 | 8274627 |
| 10 | 51959015 |
| 11 | 297786468 |
| 12 | 1672160231 |
| 13 | 9841739858 |
| 14 | 58117394971 |
| 15 | 335596648951 |
| 16 | 1939477054169 |
| 17 | 11329038418743 |
| 18 | 66061534169620 |
| 19 | 383352304222950 |
| 20 | 2227653998802348 |