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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 113 |
| 5 | 1069 |
| 6 | 3271 |
| 7 | 6917 |
| 8 | 12853 |
| 9 | 31397 |
| 10 | 223151 |
| 11 | 338033 |
| 12 | 370261 |
| 13 | 8917523 |
| 14 | 20388583 |
| 15 | 37305713 |
| 16 | 2433630109 |
| 17 | 18562236551 |
| 18 | 53153925667 |
| 19 | 75505974031 |
| 20 | 190721857463 |
| 21 | 595999647599 |
| 22 | 2135405360509 |
| 23 | 5359567534201 |
| 24 | 6353762427407 |
| 25 | 12673125337921 |
| 26 | 18817847498917 |
| 27 | 24460380625103 |
| 28 | 47581758352253 |