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 | 17 |
| 3 | 29 |
| 4 | 59 |
| 5 | 101 |
| 6 | 197 |
| 7 | 419 |
| 8 | 809 |
| 9 | 1607 |
| 10 | 3119 |
| 11 | 6197 |
| 12 | 12377 |
| 13 | 24917 |
| 14 | 49169 |
| 15 | 98321 |
| 16 | 196661 |
| 17 | 393299 |
| 18 | 786551 |
| 19 | 1572869 |
| 20 | 3145739 |
| 21 | 6292007 |
| 22 | 12582917 |
| 23 | 25166129 |
| 24 | 50331707 |
| 25 | 100663427 |
| 26 | 201327011 |
| 27 | 402653411 |
| 28 | 805306457 |
| 29 | 1610613929 |
| 30 | 3221225549 |