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 | 4 |
| 2 | 3 |
| 3 | 7 |
| 4 | 15 |
| 5 | 27 |
| 6 | 53 |
| 7 | 103 |
| 8 | 199 |
| 9 | 387 |
| 10 | 753 |
| 11 | 1467 |
| 12 | 2863 |
| 13 | 5595 |
| 14 | 10949 |
| 15 | 21455 |
| 16 | 42095 |
| 17 | 82691 |
| 18 | 162625 |
| 19 | 320179 |
| 20 | 631031 |
| 21 | 1244907 |
| 22 | 2458261 |
| 23 | 4858487 |
| 24 | 9610231 |
| 25 | 19024131 |
| 26 | 37687153 |
| 27 | 74710123 |
| 28 | 148198623 |
| 29 | 294150331 |
| 30 | 584167941 |
| 31 | 1160734623 |
| 32 | 2307488351 |
| 33 | 4589261827 |