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 | 7 |
| 4 | -5 |
| 5 | 1 |
| 6 | -20 |
| 7 | 22 |
| 8 | -8 |
| 9 | 1 |
| 10 | 61 |
| 11 | -86 |
| 12 | 46 |
| 13 | -11 |
| 14 | 1 |
| 15 | -182 |
| 16 | 319 |
| 17 | -224 |
| 18 | 79 |
| 19 | -14 |
| 20 | 1 |
| 21 | 547 |
| 22 | -1139 |
| 23 | 991 |
| 24 | -461 |
| 25 | 121 |
| 26 | -17 |
| 27 | 1 |
| 28 | -1640 |
| 29 | 3964 |
| 30 | -4112 |
| 31 | 2374 |
| 32 | -824 |
| 33 | 172 |
| 34 | -20 |
| 35 | 1 |
| 36 | 4921 |
| 37 | -13532 |
| 38 | 16300 |
| 39 | -11234 |
| 40 | 4846 |
| 41 | -1340 |
| 42 | 232 |
| 43 | -23 |
| 44 | 1 |
| 45 | -14762 |
| 46 | 45517 |
| 47 | -62432 |
| 48 | 50002 |
| 49 | -25772 |
| 50 | 8866 |
| 51 | -2036 |
| 52 | 301 |
| 53 | -26 |
| 54 | 1 |
| 55 | 44287 |
| 56 | -151313 |
| 57 | 232813 |
| 58 | -212438 |
| 59 | 127318 |
| 60 | -52370 |
| 61 | 14974 |
| 62 | -2939 |
| 63 | 379 |
| 64 | -29 |
| 65 | 1 |