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) |
|---|---|
| 0 | 22 |
| 1 | 49 |
| 2 | 103 |
| 3 | 211 |
| 4 | 427 |
| 5 | 859 |
| 6 | 1723 |
| 7 | 3451 |
| 8 | 6907 |
| 9 | 13819 |
| 10 | 27643 |
| 11 | 55291 |
| 12 | 110587 |
| 13 | 221179 |
| 14 | 442363 |
| 15 | 884731 |
| 16 | 1769467 |
| 17 | 3538939 |
| 18 | 7077883 |
| 19 | 14155771 |
| 20 | 28311547 |
| 21 | 56623099 |
| 22 | 113246203 |
| 23 | 226492411 |
| 24 | 452984827 |
| 25 | 905969659 |
| 26 | 1811939323 |
| 27 | 3623878651 |
| 28 | 7247757307 |
| 29 | 14495514619 |
| 30 | 28991029243 |
| 31 | 57982058491 |