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 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 5 |
| 4 | 10 |
| 5 | 20 |
| 6 | 25 |
| 7 | 50 |
| 8 | 85 |
| 9 | 170 |
| 10 | 340 |
| 11 | 425 |
| 12 | 850 |
| 13 | 1385 |
| 14 | 3070 |
| 15 | 6140 |
| 16 | 10225 |
| 17 | 15335 |
| 18 | 29410 |
| 19 | 65135 |
| 20 | 129070 |
| 21 | 317675 |
| 22 | 1280860 |
| 23 | 2163725 |
| 24 | 3999775 |
| 25 | 7999550 |
| 26 | 20321515 |
| 27 | 81946460 |
| 28 | 138412045 |
| 29 | 255852575 |
| 30 | 511705150 |
| 31 | 1300234475 |
| 32 | 5242880860 |