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 | 5 |
| 3 | 13 |
| 4 | 29 |
| 5 | 61 |
| 6 | 131 |
| 7 | 271 |
| 8 | 569 |
| 9 | 1381 |
| 10 | 2789 |
| 11 | 5581 |
| 12 | 11171 |
| 13 | 22369 |
| 14 | 44741 |
| 15 | 89491 |
| 16 | 185543 |
| 17 | 373273 |
| 18 | 766229 |
| 19 | 1532701 |
| 20 | 3065411 |
| 21 | 6130849 |
| 22 | 12261701 |
| 23 | 24700549 |
| 24 | 49401101 |
| 25 | 98802211 |
| 26 | 202387391 |
| 27 | 409557751 |
| 28 | 819116231 |
| 29 | 1638232471 |
| 30 | 3276464969 |