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 | -2 |
| 4 | 2 |
| 5 | -1 |
| 6 | -1 |
| 7 | 4 |
| 8 | -8 |
| 9 | 12 |
| 10 | -15 |
| 11 | 15 |
| 12 | -10 |
| 13 | -2 |
| 14 | 22 |
| 15 | -49 |
| 16 | 79 |
| 17 | -104 |
| 18 | 112 |
| 19 | -88 |
| 20 | 17 |
| 21 | 111 |
| 22 | -294 |
| 23 | 510 |
| 24 | -710 |
| 25 | 815 |
| 26 | -721 |
| 27 | 316 |
| 28 | 488 |
| 29 | -1708 |
| 30 | 3233 |
| 31 | -4769 |
| 32 | 5806 |
| 33 | -5634 |
| 34 | 3438 |
| 35 | 1503 |
| 36 | -9505 |
| 37 | 20080 |
| 38 | -31520 |
| 39 | 40592 |
| 40 | -42527 |
| 41 | 31519 |
| 42 | -1934 |
| 43 | -49666 |
| 44 | 121778 |
| 45 | -204897 |
| 46 | 278943 |
| 47 | -312396 |
| 48 | 264664 |
| 49 | -93220 |
| 50 | -233455 |
| 51 | 717295 |
| 52 | -1308634 |
| 53 | 1885694 |
| 54 | -2243578 |
| 55 | 2103343 |
| 56 | -1152593 |
| 57 | -873336 |