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 | 2 |
| 2 | -1 |
| 3 | 3 |
| 4 | -4 |
| 5 | 7 |
| 6 | -11 |
| 7 | 18 |
| 8 | -29 |
| 9 | 47 |
| 10 | -76 |
| 11 | 123 |
| 12 | -199 |
| 13 | 322 |
| 14 | -521 |
| 15 | 843 |
| 16 | -1364 |
| 17 | 2207 |
| 18 | -3571 |
| 19 | 5778 |
| 20 | -9349 |
| 21 | 15127 |
| 22 | -24476 |
| 23 | 39603 |
| 24 | -64079 |
| 25 | 103682 |
| 26 | -167761 |
| 27 | 271443 |
| 28 | -439204 |
| 29 | 710647 |
| 30 | -1149851 |
| 31 | 1860498 |
| 32 | -3010349 |
| 33 | 4870847 |
| 34 | -7881196 |
| 35 | 12752043 |
| 36 | -20633239 |
| 37 | 33385282 |
| 38 | -54018521 |