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 | 3 |
| 2 | 1 |
| 3 | 11 |
| 4 | -2 |
| 5 | 26 |
| 6 | -10 |
| 7 | 50 |
| 8 | -25 |
| 9 | 85 |
| 10 | -49 |
| 11 | 133 |
| 12 | -84 |
| 13 | 196 |
| 14 | -132 |
| 15 | 276 |
| 16 | -195 |
| 17 | 375 |
| 18 | -275 |
| 19 | 495 |
| 20 | -374 |
| 21 | 638 |
| 22 | -494 |
| 23 | 806 |
| 24 | -637 |
| 25 | 1001 |
| 26 | -805 |
| 27 | 1225 |
| 28 | -1000 |
| 29 | 1480 |
| 30 | -1224 |
| 31 | 1768 |
| 32 | -1479 |
| 33 | 2091 |
| 34 | -1767 |
| 35 | 2451 |
| 36 | -2090 |
| 37 | 2850 |
| 38 | -2450 |
| 39 | 3290 |
| 40 | -2849 |
| 41 | 3773 |
| 42 | -3289 |
| 43 | 4301 |
| 44 | -3772 |
| 45 | 4876 |
| 46 | -4300 |
| 47 | 5500 |
| 48 | -4875 |
| 49 | 6175 |
| 50 | -5499 |
| 51 | 6903 |
| 52 | -6174 |
| 53 | 7686 |
| 54 | -6902 |