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 | 11 |
| 2 | 27 |
| 3 | 66 |
| 4 | 162 |
| 5 | 397 |
| 6 | 973 |
| 7 | 2385 |
| 8 | 5846 |
| 9 | 14329 |
| 10 | 35122 |
| 11 | 86088 |
| 12 | 211011 |
| 13 | 517211 |
| 14 | 1267741 |
| 15 | 3107372 |
| 16 | 7616509 |
| 17 | 18668898 |
| 18 | 45759514 |
| 19 | 112161581 |
| 20 | 274920321 |
| 21 | 673859821 |
| 22 | 1651704234 |
| 23 | 4048508001 |
| 24 | 9923336574 |
| 25 | 24323184920 |
| 26 | 59618790539 |
| 27 | 146132186103 |