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 | 0 |
| 1 | 1 |
| 2 | -1 |
| 3 | -1 |
| 4 | -2 |
| 5 | -2 |
| 6 | -2 |
| 7 | -1 |
| 8 | 1 |
| 9 | 5 |
| 10 | 12 |
| 11 | 24 |
| 12 | 44 |
| 13 | 77 |
| 14 | 131 |
| 15 | 219 |
| 16 | 362 |
| 17 | 594 |
| 18 | 970 |
| 19 | 1579 |
| 20 | 2565 |
| 21 | 4161 |
| 22 | 6744 |
| 23 | 10924 |
| 24 | 17688 |
| 25 | 28633 |
| 26 | 46343 |
| 27 | 74999 |
| 28 | 121366 |
| 29 | 196390 |
| 30 | 317782 |
| 31 | 514199 |
| 32 | 832009 |
| 33 | 1346237 |
| 34 | 2178276 |
| 35 | 3524544 |
| 36 | 5702852 |
| 37 | 9227429 |
| 38 | 14930315 |
| 39 | 24157779 |
| 40 | 39088130 |
| 41 | 63245946 |