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 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 23 |
| 6 | 44 |
| 7 | 74 |
| 8 | 129 |
| 9 | 210 |
| 10 | 345 |
| 11 | 542 |
| 12 | 858 |
| 13 | 1310 |
| 14 | 2004 |
| 15 | 2996 |
| 16 | 4467 |
| 17 | 6540 |
| 18 | 9552 |
| 19 | 13744 |
| 20 | 19711 |
| 21 | 27943 |
| 22 | 39452 |
| 23 | 55172 |
| 24 | 76865 |
| 25 | 106200 |
| 26 | 146173 |
| 27 | 199806 |
| 28 | 272075 |
| 29 | 368247 |
| 30 | 496642 |
| 31 | 666201 |
| 32 | 890602 |
| 33 | 1184957 |
| 34 | 1571417 |
| 35 | 2075058 |
| 36 | 2731677 |
| 37 | 3582119 |
| 38 | 4683595 |
| 39 | 6102256 |