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 | 3 |
| 2 | 7 |
| 3 | 11 |
| 4 | 29 |
| 5 | 47 |
| 6 | 123 |
| 7 | 199 |
| 8 | 521 |
| 9 | 843 |
| 10 | 2207 |
| 11 | 3571 |
| 12 | 9349 |
| 13 | 15127 |
| 14 | 39603 |
| 15 | 64079 |
| 16 | 167761 |
| 17 | 271443 |
| 18 | 710647 |
| 19 | 1149851 |
| 20 | 3010349 |
| 21 | 4870847 |
| 22 | 12752043 |
| 23 | 20633239 |
| 24 | 54018521 |
| 25 | 87403803 |
| 26 | 228826127 |
| 27 | 370248451 |
| 28 | 969323029 |
| 29 | 1568397607 |
| 30 | 4106118243 |