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 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 10 |
| 6 | -1 |
| 7 | 21 |
| 8 | 1 |
| 9 | 3 |
| 10 | -2 |
| 11 | 55 |
| 12 | -1 |
| 13 | 78 |
| 14 | -3 |
| 15 | -4 |
| 16 | 1 |
| 17 | 136 |
| 18 | -1 |
| 19 | 171 |
| 20 | -2 |
| 21 | -6 |
| 22 | -5 |
| 23 | 253 |
| 24 | -1 |
| 25 | 10 |
| 26 | -6 |
| 27 | 3 |
| 28 | -3 |
| 29 | 406 |
| 30 | 4 |
| 31 | 465 |
| 32 | 1 |
| 33 | -10 |
| 34 | -8 |
| 35 | -12 |
| 36 | -1 |
| 37 | 666 |
| 38 | -9 |
| 39 | -12 |
| 40 | -2 |
| 41 | 820 |
| 42 | 6 |
| 43 | 903 |
| 44 | -5 |
| 45 | -4 |
| 46 | -11 |
| 47 | 1081 |
| 48 | -1 |
| 49 | 21 |
| 50 | -2 |
| 51 | -16 |
| 52 | -6 |
| 53 | 1378 |
| 54 | -1 |
| 55 | -20 |
| 56 | -3 |
| 57 | -18 |
| 58 | -14 |
| 59 | 1711 |
| 60 | 4 |