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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 9 |
| 6 | 17 |
| 7 | 26 |
| 8 | 47 |
| 9 | 72 |
| 10 | 129 |
| 11 | 194 |
| 12 | 348 |
| 13 | 516 |
| 14 | 929 |
| 15 | 1351 |
| 16 | 2456 |
| 17 | 3506 |
| 18 | 6471 |
| 19 | 8929 |
| 20 | 17029 |
| 21 | 22579 |
| 22 | 44707 |
| 23 | 55969 |
| 24 | 117836 |
| 25 | 137313 |
| 26 | 311654 |
| 27 | 324989 |
| 28 | 833496 |
| 29 | 756309 |
| 30 | 2242031 |
| 31 | 1623709 |
| 32 | 6176873 |
| 33 | 3240757 |
| 34 | 17192674 |
| 35 | 4663165 |
| 36 | 49481888 |
| 37 | 1180046 |
| 38 | 144593684 |
| 39 | -40561669 |
| 40 | 439929287 |
| 41 | -230303695 |
| 42 | 1351358555 |
| 43 | -1116634980 |
| 44 | 4353263697 |