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) |
|---|---|
| 2 | 23 |
| 3 | 86 |
| 4 | 339 |
| 5 | 1332 |
| 6 | 5298 |
| 7 | 21066 |
| 8 | 83987 |
| 9 | 334966 |
| 10 | 1336988 |
| 11 | 5338206 |
| 12 | 21321234 |
| 13 | 85176636 |
| 14 | 340338398 |
| 15 | 1360073016 |
| 16 | 5435820051 |
| 17 | 21727481616 |
| 18 | 86853790498 |
| 19 | 347214198246 |
| 20 | 1388133456348 |
| 21 | 5549915835836 |
| 22 | 22190143855898 |
| 23 | 88725807876186 |
| 24 | 354775752246802 |
| 25 | 1418633882621748 |
| 26 | 5672803378074548 |