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 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 23 |
| 6 | 49 |
| 7 | 95 |
| 8 | 177 |
| 9 | 359 |
| 10 | 705 |
| 11 | 1351 |
| 12 | 2689 |
| 13 | 5303 |
| 14 | 10321 |
| 15 | 20423 |
| 16 | 40353 |
| 17 | 79223 |
| 18 | 156657 |
| 19 | 309991 |
| 20 | 611713 |
| 21 | 1210967 |
| 22 | 2399761 |
| 23 | 4750919 |
| 24 | 9419937 |
| 25 | 18694199 |
| 26 | 37092657 |
| 27 | 73659175 |
| 28 | 146373313 |
| 29 | 290909975 |
| 30 | 578470225 |
| 31 | 1150862855 |
| 32 | 2290191585 |
| 33 | 4559123447 |