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) |
|---|---|
| 1 | -3 |
| 2 | -1 |
| 3 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 16 |
| 7 | 23 |
| 8 | 42 |
| 9 | 66 |
| 10 | 104 |
| 11 | 162 |
| 12 | 251 |
| 13 | 397 |
| 14 | 625 |
| 15 | 980 |
| 16 | 1539 |
| 17 | 2415 |
| 18 | 3792 |
| 19 | 5956 |
| 20 | 9351 |
| 21 | 14682 |
| 22 | 23053 |
| 23 | 36196 |
| 24 | 56834 |
| 25 | 89238 |
| 26 | 140116 |
| 27 | 220003 |
| 28 | 345437 |
| 29 | 542387 |
| 30 | 851628 |
| 31 | 1337181 |
| 32 | 2099571 |
| 33 | 3296636 |
| 34 | 5176204 |
| 35 | 8127403 |
| 36 | 12761220 |
| 37 | 20036995 |
| 38 | 31461034 |
| 39 | 49398458 |
| 40 | 77562856 |
| 41 | 121785110 |
| 42 | 191220563 |
| 43 | 300244453 |