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 | 1 |
| 3 | 0 |
| 4 | -1 |
| 5 | -2 |
| 6 | -1 |
| 7 | 1 |
| 8 | 4 |
| 9 | 5 |
| 10 | 2 |
| 11 | -5 |
| 12 | -12 |
| 13 | -13 |
| 14 | -3 |
| 15 | 17 |
| 16 | 34 |
| 17 | 32 |
| 18 | -1 |
| 19 | -54 |
| 20 | -93 |
| 21 | -72 |
| 22 | 28 |
| 23 | 169 |
| 24 | 248 |
| 25 | 152 |
| 26 | -147 |
| 27 | -510 |
| 28 | -646 |
| 29 | -282 |
| 30 | 582 |
| 31 | 1484 |
| 32 | 1627 |
| 33 | 375 |
| 34 | -2045 |
| 35 | -4195 |
| 36 | -3927 |
| 37 | 110 |
| 38 | 6716 |
| 39 | 11544 |
| 40 | 9002 |
| 41 | -3458 |
| 42 | -20996 |
| 43 | -30921 |
| 44 | -19123 |
| 45 | 17974 |
| 46 | 63154 |
| 47 | 80435 |
| 48 | 35553 |
| 49 | -71525 |
| 50 | -183969 |