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 | 1 |
| 2 | 3 |
| 3 | -1 |
| 4 | 8 |
| 5 | -6 |
| 6 | 1 |
| 7 | 21 |
| 8 | -25 |
| 9 | 9 |
| 10 | -1 |
| 11 | 55 |
| 12 | -90 |
| 13 | 51 |
| 14 | -12 |
| 15 | 1 |
| 16 | 144 |
| 17 | -300 |
| 18 | 234 |
| 19 | -86 |
| 20 | 15 |
| 21 | -1 |
| 22 | 377 |
| 23 | -954 |
| 24 | 951 |
| 25 | -480 |
| 26 | 130 |
| 27 | -18 |
| 28 | 1 |
| 29 | 987 |
| 30 | -2939 |
| 31 | 3573 |
| 32 | -2305 |
| 33 | 855 |
| 34 | -183 |
| 35 | 21 |
| 36 | -1 |
| 37 | 2584 |
| 38 | -8850 |
| 39 | 12707 |
| 40 | -10008 |
| 41 | 4740 |
| 42 | -1386 |
| 43 | 245 |
| 44 | -24 |
| 45 | 1 |
| 46 | 6765 |
| 47 | -26195 |
| 48 | 43398 |
| 49 | -40426 |
| 50 | 23373 |
| 51 | -8715 |
| 52 | 2100 |
| 53 | -316 |
| 54 | 27 |
| 55 | -1 |
| 56 | 17711 |
| 57 | -76500 |
| 58 | 143682 |