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 | 4 |
| 2 | 9 |
| 3 | 19 |
| 4 | 36 |
| 5 | 64 |
| 6 | 111 |
| 7 | 187 |
| 8 | 312 |
| 9 | 515 |
| 10 | 844 |
| 11 | 1378 |
| 12 | 2243 |
| 13 | 3643 |
| 14 | 5910 |
| 15 | 9578 |
| 16 | 15515 |
| 17 | 25122 |
| 18 | 40667 |
| 19 | 65821 |
| 20 | 106521 |
| 21 | 172377 |
| 22 | 278935 |
| 23 | 451350 |
| 24 | 730325 |
| 25 | 1181717 |
| 26 | 1912085 |
| 27 | 3093847 |
| 28 | 5005978 |
| 29 | 8099873 |