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 | -2 |
| 3 | -4 |
| 4 | 1 |
| 5 | -8 |
| 6 | 10 |
| 7 | -16 |
| 8 | -1 |
| 9 | 7 |
| 10 | 20 |
| 11 | -32 |
| 12 | -10 |
| 13 | -64 |
| 14 | 40 |
| 15 | 46 |
| 16 | 2 |
| 17 | -128 |
| 18 | -27 |
| 19 | -256 |
| 20 | -20 |
| 21 | 92 |
| 22 | 80 |
| 23 | -512 |
| 24 | 14 |
| 25 | 37 |
| 26 | 160 |
| 27 | -17 |
| 28 | -40 |
| 29 | -1024 |
| 30 | -150 |
| 31 | -2048 |
| 32 | -3 |
| 33 | 184 |
| 34 | 320 |
| 35 | 202 |
| 36 | 53 |
| 37 | -4096 |
| 38 | 640 |
| 39 | 368 |
| 40 | 28 |
| 41 | -8192 |
| 42 | -300 |
| 43 | -16384 |
| 44 | -80 |
| 45 | -146 |
| 46 | 1280 |
| 47 | -32768 |
| 48 | -26 |
| 49 | 175 |
| 50 | -129 |
| 51 | 736 |
| 52 | -160 |
| 53 | -65536 |
| 54 | 85 |
| 55 | 404 |
| 56 | 56 |
| 57 | 1472 |
| 58 | 2560 |
| 59 | -131072 |
| 60 | 242 |
| 61 | -262144 |