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 | 4 |
| 3 | 9 |
| 4 | 19 |
| 5 | 40 |
| 6 | 81 |
| 7 | 164 |
| 8 | 329 |
| 9 | 659 |
| 10 | 1320 |
| 11 | 2641 |
| 12 | 5283 |
| 13 | 10568 |
| 14 | 21137 |
| 15 | 42276 |
| 16 | 84553 |
| 17 | 169107 |
| 18 | 338216 |
| 19 | 676433 |
| 20 | 1352868 |
| 21 | 2705737 |
| 22 | 5411475 |
| 23 | 10822952 |
| 24 | 21645905 |
| 25 | 43291811 |
| 26 | 86583624 |
| 27 | 173167249 |
| 28 | 346334500 |
| 29 | 692669001 |
| 30 | 1385338003 |
| 31 | 2770676008 |
| 32 | 5541352017 |
| 33 | 11082704035 |